Select tablet or netbook?

Tablet PCs are more portable, operating system, consistent with a touch screen and the small size while netbook can help entrepreneurs run applications from the Windows Professional.

One year appeared on the market could be not enough for many users to answer questions should use the netbook or tablet computer for their own needs. While in 2010 is considered to be the year of the netbook tablet have started slow in both sales and number of new models appeared recently.

The tablet form on the market as Apple iPad or Galaxy Tab certainly better than a netbook for mobility and battery life. However, a laptop computer running Windows has its own advantages.

Here are some comparative advantages of these two series for each purpose, the need to use the user easily select accordingly.

Why netbook better

Performance and applications

There are many computer models now support tables Adobe Flash in its browser but mostly to see the content than the ability to interact with users. If you like games like Restaurant City or FarmVille on Facebook, a netbook will certainly serve better.

For those who use iPad to travel to places never previously set foot, so to the best of Apple tablet in the house and replace it with a mini laptop or netbook. Some airlines and hotels use flash web content, something that Apple devices can not be displayed.

Although IOS and the repositories Android are becoming larger, but the programs running on Windows has a long history of development options and provide large scale significantly better. One of the main software VPN (Virtual Private Network) encryption key for the operating system desktop. VPN is a requirement for companies to allow employees to access the personal database.

Feature set

Only a few samples of tablet PCs equipped with SD card reader (most use the microSD card replacement) and even very few models have USB ports. On the other hand, are most netbooks come with handy card reader, 2 to 3 USB ports and VGA output. Even, even if your USB tablet driver is compatible with external devices is not as Windows or Mac OS.

Virtual keyboard is always a long story when comparing between netbook and tablet. However, it is clear that a keyboard will be more convenient for people to write a email or a presentation. Furthermore, despite multiple tasks, but still only tablet that can display one application at a time while the netbook can simultaneously display multiple windows to track.

Storage capacity

Tablet use flash memory storage, faster and more secure than magnetic disk drives in netbook traditional. However, storage is the main problem of current tablet when most models are only the largest capacity is 64GB, while popular netbooks around 250GB hard drive. Except for about 20GB of space for Windows, users are still more than 200GB for storage.

Netbooks more attractive prices

Due to popularity, netbook is now available at attractive prices than ever before. Current price for a stable model used in Vietnam to around 6-7 million. Meanwhile, the first iPad also cost at least more than 10 million, to form stable cheap but not as high as Archos also has about $ 8 million.

Reason tablet dominance

Duration good battery life and the ability to immediately

Like other smart phone models, computers rarely been off the table would only be put on standby status to save power. This makes the device status can return to work almost immediately. The tablet can send / receive email or text message for 24 hours a day. Battery life is also better than the netbook for about 10 hours of continuous use.

Costs for applications

Most IOS Android applications and are priced from just 1 USD to 20 USD is very easy for users to buy used. Meanwhile, the proprietary Windows programs can cost several hundred dollars for a professional.

Multi-touch screen

Some recent models such as the Lenovo IdeaPad S10- has equipped multi-touch screen. However, the look and functionality on the Windows operating system can not be compared with Android, IOS or Tablet BlackBerry OS on the ability to use touch screen and user interaction.

OS suitable for smaller screen netbook

Not only is the mobile platform created for touchscreen devices. The OS has been using a tablet interface, icon or software controls are consistent with the small screen to the user to easily manipulate and get acquainted.

You can read more 5 reasons to buy a computer table

Conclusion

If users travel frequently and regularly to check email, web browsing and social networking players, tablet PCs are great choices. On the other hand, netbooks may provide the convenience, more flexibility when transferring photos from camera to computer and business customers need VPN or professional programs.

5 reasons to buy a computer table

iPad, Galaxy Tab, Xoom ... Motorola computer boards are flooding the market. But why should people buy this product? There are 5 main reasons.

At the time of the smartphone, laptop and tablet computers are competing fiercely with each other and also not so different, the question "Why should I buy a computer table?" Becomes not easy to answer with more users especially those who have both the laptop and smartphones.

The people have used this product line, said most of them originally bought out of curiosity but gradually they realize it is actually a useful product and potentially "addictive." However, in the near future, the tablet can not completely replace the PC (laptop or desktop) of everyone.

Here are 5 reasons to buy and use computer expert panel that has reviewed the experience of many users.

The compact

Compared with a conventional computer or even a laptop belonging to the super lightweight, a tablet computer still showed light and easy to "walk around" more. Some have used this product line through the comments, there are still quite severe form when holding with one hand but if held by two hands or put it on a flat surface that the tablet becomes very great.

To handle a computer to surf a little table while watching TV is really comfortable and you will see the laptop unwieldy, heavy and slow to boot out stars.

Compared to a smartphone, though there is a startup speed is quite fast (almost immediately) but the screen is still quite small, not enough to display full web pages as a normal computer table has no rival.

Useful

Do not expect a tablet with touch keyboard will help you do more work related to drafting, but in the workplace, it helps you solve a number of things quite quickly and conveniently. For example, you can sit next to the computer and turned to check email, review your calendar with just a touch lighter and glance. While sitting in a meeting, you will be able to record some outlines for speeches, recorded a number of important ideas or an immediate download documents related to meetings ... With computer table you will not have to miss the pile of papers and documents as before.

The students will also find a useful iPad. Instead of carrying a backpack of books, they just need to download and save electronic textbooks in the iPad.

However, if you need to carry both a laptop for homework, the computer table can be a burden to students.

Entertainment

Many people have recognized the tablet is a great entertainment tool. Thanks to a wide enough screen, light weight, watching movies, watching television, reading becomes quite comfortable. This is the smartphone can not do it.

Computer gaming table is also a hobby of many people. Not unjustly Angry Birds that developed so quickly, that many people so fascinated. Many experts say the computer has to be dependent on the touch screen to control the game developers were forced to find more creative solutions, which makes the game more unique and interesting even more.

High compatibility

But the game is not the only things you can download and run on a computer spreadsheet. Today, we were pretty lucky when you want to do anything on the computer table, surely would have applied to serve you. You like reading the newspaper and follow the news daily from around the world? Please download a variety of applications for information. You want "eight" with friends on social networks? Please download the application ...

Of course, on your computer you can do more but the tablet has been selected by many of the applications installed on it "as easy as playing." You do not need to be wrestling with these "key products", registration code, serial number ranges ... even several tens of minutes and sat waiting for installation. With the tablet, just a few seconds.

In many situations, computer tables suddenly became king. That's when your smartphone can not do something, but the laptop proved heavy and slow.

Forget the worries about batteries

Most laptops only work from about 2.5 to 3 hours using battery power. Most modern smartphones can only be used one day by batteries with limited conditions, even worse when the smartphone should be charging 2 times daily. But with the tablet, you can work, full of entertainment all day on it without having to worry about out of battery.

You can find Apple Ipad in Amazon : Apple iPad MB292LL/A Tablet (16GB, Wifi) or Samsung Galaxy Tab (T-Mobile)

eBook Reader: What should you know

eBook Reader with many facilities can meet the needs of those who always wanted to explore knowledge. However, if you are intending to buy yourself a device of this type should consider several factors to choose their own use an available product, like the best.
 
Choose Format Book

 
EBook Reader a good response to the clear text display. In addition, electronic reading devices also have a long battery life, easy to travel and have the screen without causing eye strain and well read in many different environmental conditions.

Fortunately, almost all products are currently reading machines satisfy this element, but also some other factors that you need to understand and consider.

Need to find out the specs when buying

Before buying, you should visit the manufacturer's home page to find out detailed specs of the machine. One of the most important parameter is the eBook Reader format books that machine supports.

Most machines eBook reader will support these formats, including HTML, TXT, MP3, JPG ... However, the format war in the world still occur between the eBook format. Azw of Amazon, who is leading in this area and open ePub format.

While not support ePub Kindle almost all other types favor this standard. The fact that a great influence to the users, countless other publishers of electronic books using ePub - including Google's book store, itself a new Apple iPad ePub is also used as the official standard for book store my iBook.

With the advantage of "open", ePub allows publishers to create more diversified products. Azw Amazon. Besides, ePub is also not locked by DRM annoyances. However, if you will want to be with any of the lines?

With Kindle, you get good support and holdings (legal) large enough attractive title of the Amazon, while the other product lines will create comfort during use.

Library book

 
This is one leading factor to keep in mind when you buy electronic book reader device. Most manufacturers have their distribution model of their own books and of course the size of the library plays an important role.

Source Book larger users more opportunities to access the book you want to read, this is one of Amazon's Kindle made superior to other competitors.

As retailers largest book online now, Amazon took advantage of their relations to elevate the Kindle with the e-books. Consequently users have a huge book store with more than 300,000 different titles.

However, other manufacturers like Sony is catching up very fast. The company recently announced alliance with Google to put more than half a million titles to store their e-books. Sony owners can use these books for free.

Meanwhile, the e-book series of other brands do not have such backing. Although users can still buy books from online stores, but obviously the sharing of content will not be favorable. It's like you buy music from iTunes to bring up the iPod compared to post an MP3 from the manufacturer to another.

Accessibility
 
Many models of electronic reading only support the wireless broadband fixed, for example, Kindle uses Sprint's EVDO in the U.S..

So if you bring them back to Vietnam, the only way you can put a book on computer via USB connection. This is clearly not comfortable with buying books directly through the wireless communication anywhere, anytime - completely independent of the computer. International buyers can not qualify to own a DX machine like Amazon Kindle, unless they have a fixed address in the U.S..

Even if you have relatives from the U.S. households purchase, you will not be used with any other data networks and are forced to copy the data into the computer via USB.

In this case, more likely to buy a cheaper model to use USB just like the Sony Reader is more economical again.

In fact, many models of electronic books are sold specifically for each country. Typically BeBook mainly present in Europe, while Fujitsu Flepia only for the Japanese market.

Value Added

If reading is the only requirement, the cheaper models will better support this demand, but more often they will not do anything special.

If you want to read blogs or watch the online journal, you will need these devices such as Kindle. The reason is that Amazon allows users to blog on this series.

Plus, with Wi-Fi, PC also allows users to surf the web pretty well. Also, you can also choose models with the Linux operating system by just a few tips can hack that lets you run multiple applications very convenient.

EBook Reader Market is in very rich with many different options in terms of form, style of performance.

Most machines are the size of a book page with E Ink display - origin from a company in Cambridge Massachusetts.

The problem is that you will choose Kindle (retail price around 360 USD) from Amazon, which are commonly used with or to select from other brands? Themselves as computer maker Asus introduced several models of electronic books in the recent Computex.

Meanwhile, rumors said that Apple is planning to form iPad 7 "specifically for reading electronic books will give you many more choices for their favorites.

Some of the popular eBook Reader Market

Amazon Kindle DX

 

Samples of the Amazon eBook Reader hit with e-Ink screen 9.7 ", support for reading e-journals, blogs, PDF and electronic books. Thick machine about 1 / 3 inch boot time to less than 60 seconds.

According to the manufacturer, Kindle DX can operate independently without PC - a strong point compared with the iPad.

Besides, it also has a battery life of up to one week with Wi-Fi. Reading books, Amazon says Kindle DX can run continuously for 2-3 weeks.









Teclast K5

This product has a color LCD 5 "800 x 480 resolution using c-Paper technology.

In addition to the eBook reader to support popular formats TXT, PDF, PDB, DOC, ePub, HTML and other rich formats including Microsoft Word files.

Teclast K5 focus on consumer segment view of a color comic on the PDF. It also supports high quality video formats such as RMVB / FLV / AVI 720p standard.

Built-in memory of the machine is 4GB, but users can add external memory card.

You can find this product in Amazon:

Sony eBook PRS-505

 

This is one of the best eBook Reader is now home crowd with screen readers by e-Ink technology, allowing users without eyestrain when reading.

Tilt 180 degree visibility and a special display as regular paper. Fully integrated SD and MS card reader that allows upgrade storage .

Machine integrated MP3 player with 3.5mm headphone jack commonly used.

Machine with 8 gray mode allows you to easily read, and especially to read 7500 pages for a single charge eBook, ebook support multiple standards.

You can find this product in Amazon: Sony PRS-505 Portable Digital e-Reader System (Silver)

Cowon 3D: first movie machine without the glass

Recently, Cowon introduced the product to market in the world's first PMP to use 3D technology presentations without special glasses.

The product line PMP (Portable Multimedia Player) is quite familiar with the vast majority of young dynamic people who play sports and those who like to bring supplies with you a personal entertainment media.

Cowon 3D design is relatively compact in size and weighs 232g 82x17.3mm 128x, much smaller than the current tablet. Luxury white crust with rounded edges giving charm for this product line.

4.8 inch touch screen TFT with resolution 800x 480 pixel offers enough space for you to "surf" and "touch" ease.

According to information from the manufacturer, this 3D version will use the Pentium III 500MHz processor running Windows CE 6.0 operating system to run "smoothly" the application of personal entertainment.

And highlights the success for the Cowon 3D is the 3D feature presentations without using any other specialty glass, so that you can see images of objects floating on the computer screen when viewing 3D movies.

Not so this machine can you enjoy full HD 1080p movies either directly or through the big screen thanks to the HDMI output of the machine.

Cowon's sound pretty good with the support of BBE +, Stereo Enhance, Reverb, and 39 sound effects JetEffect help you experience the film more fully. Cowon also integrated WiFi 802.11 b / g to surf your comfort and updated news.

Easy connection

Also, there are some features that the PMP is indispensable: listening to music, play games, read ebooks and documents (including the typical formats such as PDF, Doc, PPT, XLS ,...), or you can also look up the dictionary quickly, and many applications are still awaiting discovery consumers.

Time, long battery life, compared with the tablet PC product line is now: 10 hours of video playback, 45 hours of music playback and up to 300 hours when the computer in standby mode.

PMP this product has just been released in two versions at a price of 32GB and 64GB respectively, and 510 USD 430 USD.

View 3D from the glasses with Cinemizer Plus

Plus glasses Cinemizer is capable of photo slideshows directly from the 3D glasses without a HDTV or other removable external screen. 

3D tiny transmitters of Carl Zeiss. Photo: Carlzeiss.

Cinemizer Plus will support the 3D version of the product was Cinemizer Carl Zeiss, maker of the famous German lens, the previous release. Plus Cinemizer nature and appearance as a pair of glasses, but the owner of special screen located on the lens, allowing users to enjoy the popular three-dimensional image is projected from the lens without need to screen other types of external, such as HDTV or projector screen ...

The lens is composed of Cinemer Plus is a tiny video screen, using OLED technology with ratio 16:9 and reach a resolution of 640 x 480 pixels, making the wearer feel like looking at a screen external dimensions 45 inches and at distances over one meter. A small box with removable glass allows for 3D glasses Cinemizer Plus can play images directly from the iPhone and the iPod, either from other smart phones, video machines, laptops ...

3D theater's tiny battery Carl Zeiss is used continuously for four hours and can be recharged via USB port, enables users to enjoy 3D films at any time and anywhere.

Currently, the German manufacturer is launching a sale price around 390 USD (for a pair of 3D glasses slide mobile with name Cinemizer Plus .

Toshiba Qosmio X500 review: powerful entertainment

Toshiba X500 owns the big screen, power configure with every performance famous speakers deserve a valuable entertainment machine.

Toshiba Qosmio X500-series desktop replacement laptop with large screen sizes up to 4.58 kg in weight when battery life is not much use. Interestingly, the model is equipped with power hardware  and especially the speaker system "brand name" Harman / Kardon satisfy the entertainment needs.

Qosmio X500 is equipped with screen size 18.4 inch WXGA Standard resolution of 1680 x 945 pixels. This model is equipped with hardware, including Intel Core i7-720QM speed 1.6 GHz, Mobile Intel PM55 Express chipset, 4GB DDR3 RAM, NVIDIA GeForce GTS graphics card with 1GB VRAM 250m, hard drive speed of 640 GB 7200 rpm drive and Blu-Ray.

This model has dimensions 2.95 x 44.3 x 41.5 mm, weighing 4.58 kg with 12 cell battery included. X500 is preloaded operating system Windows 7 Home Premium (64bit)

Advantages

- The display large, good viewing angle.
- Manipulate keyboard, comfortable to use.
- Touchpad sensitivity and accuracy.
- The speakers sound good.
- High Performance.

Cons

- High resolution screen is not HD.
- Multimedia shortcut inconvenience.
- Memory is not commensurate with the price and general configuration.
- Machine heavy, bulky, expensive suit, only a few users.

1. Design, keyboard, sound

Design

Toshiba Qosmio X500-size 4.43 x 2.95 x 41.5 mm, weighing 4.58 kg with 12 cell battery included. This model is made of plastic shell of the ball should be quite easy to stick when using fingerprints. However, the design is still sinking, the red rim around the Qosmio logo stand out, make a good impression with computer users first sight.

This model is equipped with almost all the connections, but with fairly wide area, it seems that in the next three USB ports and one USB / eSATA is a bit less for a machine system such as X500.

Right side of the machine is Kensington lock, power jack, VGA, two USB ports, headphone and microphone jacks. The left side is the LAN port, eSATA / USB combo, USB, HDMI, FireWire, Express Card slot, and Blu-ray optical drive. Meanwhile, front side only memory card reader / off switch and wireless connectivity are integrated.

Are replaced by the desktop so this model looks quite bulky and heavy but this is an understandable and "feel" for X500 directed to a different customer segment.

Keyboard and Touchpad.

Owned by screen size and large machines X500 spacious keyboard, plus the numeric keypad on the side for convenient text manipulation. The keyboard is designed for Toshiba characteristics of a good bounce and the distance the keys have a reasonable action should rarely be confused.

This model is equipped with multimedia keys on the left touch keyboard. The buttons are quite sensitive but in the process of always making the keyboard press the wrong key. In addition, tests during games, manipulating the sound off or increase or decrease the volume by the shortcut, the program was automatically ejected and was quite inconvenient.

X500 touchpad support for manipulating multi-point sensitivity and accuracy despite its tiny size. The mouse buttons below the same sensitivity, while pressing for definitive sense.

Sound.

Because laptops line replace desktops should be directed to entertainment X500 speaker system is equipped with "brand name" Harman / Kardon. Quality almost nothing to discuss with excellent sound, clear treble and bass are good to experiment with high-quality music files.

Only one thing is regrettable that the volume is not large as expected although much larger in comparison with other advanced laptops. This system enough to hear in the room over 30 m2.

2. Monitors and Performance

Monitors

Qosmio X500 is equipped with screen size 18.4 inch WXGA Standard resolution of 1680 x 945 pixel resolution Clear SuperView TFT technology. One thing is quite difficult to understand the price level and thus the computer screen is not the type of Full HD resolution of 1920 x 1080 pixels. However, this difference is not easy to identify with the naked eye while enjoying high-definition video.

Except weakness of resolution, the X500 is basically good for image quality, sharp brightness according to the manufacturer announced a 200 NIT. Machine with the ability to impress even better anti-glare outdoor use and excellent tilt angle with no color change but only a little bit better when the direction angle to the side.

Performance.

Qosmio X500 versions are equipped with test hardware, including Intel Core i7-720QM 1.6 GHz speed, Mobile Intel PM55 Express chipset, 4GB DDR3 RAM, NVIDIA GeForce graphics card with 1GB GTS 250m VRAM, 640 GB hard drive for speed 7200 rpm and Blu-Ray optical drive.

With hardware configurations as the machine gained 5.7 points (taken at low click rate because of the hard drive) when the dots with the system on Windows Experience Index Windows 7 Home Premium (64bit) preinstalled the machine. On a scale of detail, the processor reaches 7 points, RAM is 7.3 points while the graphics capabilities for gaming and graphics together to reach 6.7 points.

Meanwhile, if you use the program to test points 3DMark06 graphics power, the Qosmio X500 achieved a truly impressive number is 7711 points, much higher than average level of replacement laptop computer desktop is 6202 points (average data taken from page Laptopmag). However, although still strong, but X500 "Welcome loser" of every other crisis as MSI GT725 (with 9859 points), FX Gateway P-7808u (with 10,019 points) and especially Alienware M17x (with 13,463 points).

Burnout Paradise game more stable at 50 frames per second. Screenshots.

When playing a game testing requirements as PES2010 average graphics, machine speeds stable at 60 frames per second with the highest level setting. Also required the game graphics are a bit more Burnout Paradise at default settings, the Qosmio X500 also achieved an average of more than 50 frames per second. As for the heavy games like Far Cry 2 at a resolution of 1024 x 768 pixels machines reach speeds of about 80 frames per second, higher than the average of 60 frames per second of the line desktop replacement laptop Other (average data taken from page Laptopmag).

3. Radiator and battery.

Radiator

Toshiba Qosmio X500 does not have heat vents in the side. Instead, the producers arranged face down all the machines. Therefore, the machine to heat up pretty fast when on a desk. However, because the alternative models to heat the underside of the table should not affect too many people to use. In addition, heat generated also in the acceptable level, except the game a long time need to arrange an additional heat sink base bottom.

Meanwhile, if using only normal to watching movies or listening to music, very difficult to feel the heat of the machine in hand on the keyboard and touchpad.

Battery

Toshiba Qosmio X500 is equipped with 12-cell battery included. When installed on your computer, battery and did not fit into the back or convex-down machine.

With high-capacity battery, but due to the big screen, discrete graphics using the computer rather should "eat" batteries. If you increase the screen brightness to maximum and watch videos continuously, the machine was running only about less than 2 hours. This level is higher than "Supper laptop" and Asus Alienware M17x W90Vp for use only for an hour.

If to the average brightness, keyboard backlight off, turn on Wi-Fi, listening to music and using normal office functions, the model for using time about 3 hours continuously.

However, with a machine to replace a desktop, the battery is still at quite so long battery life was never the focus of manufacturers for this laptop.

You can find this laptop in Amazon: Toshiba Qosmio X500-S1801 - Core i7 720QM / 1.6 GHz - RAM 4 GB - HDD 500 GB - Blu Ray ROM DVD

GeForce 3D Vision - Good device for entertainment

NVIDIA GeForce 3D Solutions 3D Vision supports many games, allowing people with 3D experience and many innovative easy to use, more convenient.

Ministry of 3D glasses NVIDIA GeForce 3D Vision LCD manufacturing technology initiative should achieve both high image quality and color resolution (Full HD). LCD glasses is able to control open (with closed state) and off (transparent) with frequencies up to 120Hz, the two eyes independently. This requires the display to achieve high frequency, to optimize the 100Hz, so now only a few screen accordingly. In return, the color will be transmitted to the eye and full details of the image is guaranteed. Frequencies in the LCD NVIDIA GeForce 3D Vision 3D glasses can be adjusted to suit each environment and resolution of the display (4 settings are available: the open night-lights, on-off light, night-open light 50Hz, game). Rimmed glass beautifully designed, and lighter than previous design title could remove the nose assembly, replacing three small, medium, large included.

Designing the wireless communication, infrared waves Vision 3D has allowed the freedom of movement and ability to connect more with the receive device, share, experience 3D. Receive device still do the job automatically sync signal, activated glass when the display mode and 3D wheel controls to fine-tune your depth while 3D views (no need to exit and enter 3D mode menu control).

Mode processing, 3D display supported by hardware and integrate the solution so drivers can support, performance is quite content sources, including image, video and games. List of game activities with 3D glasses may Vision 3D has over 400 games, including highlights of Batman: Arkham Asylum, Biohazard 5, Resident Evil 5 ...

Experience with photos, video samples NVIDIA add-in available supply, and video games Batman: Arkham Asylum with quite natural 3D space with depth, surface floating separated clearly. Color shown rich and detailed picture of very high. In the game Batman: Arkham Asylum, 3D mode shows all beauty of the wonderful way the kick of the "Batman" and help facilitate observation for monsters to appear almost from the popular "four way  eight direction".

NVIDIA GeForce 3D Vision solution only for high-profile computer and requires strict synchronization: display support (ready) 3D Vision GeForce, GPU NVIDIA GeForce match, Windows Vista 32/64 bit, standard Game DirectX. Recommended: CPU Intel Core 2 Duo or AMD Athlon X2, GeForce 8 GeForce 9 / GeForce GTX200, 2GB RAM, 100MB hard drive, Windows Vista 32/64 bit. Reference books dach details www.nividia.com/3dvision.

Set not too hard, mainly connecting cable and software installation instructions properly. Set initial steps have specific instructions, intuitive step. Menu controls NVIDIA Control Panel will appear more entries Set Up Stereoscopic 3D and you should check the box Enable Stereoscopic 3D. First infrared communication should face with glasses, how about 45cm across and not be sure.

Besides wearing eye glasses Vision 3D, the product provides the audio changes from the 2.5 mm VESA, DVI to HDMI cable, USB 2.0 cable A to mini B, USB A to USB charging cable mini-B, including fabric glass containers, installation instructions and software disk. Accessories also include protection of glass cloth and glass cloth dedicated.

You can buy this glass in Amazon:  nVidia GeForce 3D Vision Kit