This is my first experience with this kind of device. It's called Alphasmart. Basically, its purpose is to write documents. It comes with a standard keyboard that comes with any laptop or desktop. With the same device is a calculator-like screen that is just above the keyboard. And, that's really all there is to it.
The great thing about this product is that it lacks all of the distractions that come available with any standard desktop or laptop. Students can't go to Facebook, check their email, to gaming sites, watch videos, and etc. All of those distractions have been basically removed from the Alphasmart since all it does it type up documents.
After a document has been typed up on the Alphasmart, the chosen file can be uploaded to a desktop or laptop by connecting a USB cord from the Alphasmart to the target computer. When you press "send" on the chosen file while a blank Microsoft Word document is open, the file typed up on the Alphasmart will immediately and automatically be typed up in the blank MS Word doc. That's great since it will also highlight most or all of each student's spelling mistakes.
An interesting distraction free tool if you want students to type up their work.