Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: What kind of switches do the keys use?
Document: The action of the keys is extraordinary; even though I don't use a keypad very often, my fingers fly at a rate I never thought possible.Paired with a keyboard such as the Kinesis Freestyle, this keypad resolves one of the most common ergonomic problems: when a keyboard has a built-in numeric keypad, either you twist your wrist to reach the mouse, or you twist your wrists to type on the keyboard. The only solution is to move the keypad out of the way!
Amazon customer reviews led me to this unit. Out of the box, it has non-skid feet and enough weight to stay put. It has good feedback, also esc, tab, backspace and enter keys. (So you do not need to use the keyboard for spreadsheet entries). No need to run an install CD- Windows XP and Win7 installed drivers automatically. A good value for laptop number-crunchers.Accountants! You need to try this one!
Anyone dis-satisfied with the paltry, diminuitive F-Key Row should know that MALTRON keyboards' keys are all full-sized.
The action on the keys is great..and with two USB slots..I hooked my mouse and Freestyle two to the number pad..Im using the Evoluent 4 mouse..and 3M mouse pad..This is a great set up..
It changes the behavior of the other keys to what you'd expect, but never tells the computer about  the mode change at all.That just sucks. I'll be glad If I can prevent anyone else from a useless purchase. For my purposes, it's a dead key. This little pesky detail is never mentioned anywhere. That's why I wrote this review.If you don't remap keys, it's an A+ product... however, I do, so got to give it 3 stars for being misleading...
It does what it is supposed to and I like how it switches number lock internally, not in the computer settings. This lets me leave it in what ever setting I want it to be in without it messing up my keyboard settings. What I don't like is when I have it hooked up to my work computer where I don't have Admin rights, every time I press a key the computer beeps. It doesn't happen right away when I plug it in but shortly after it starts causing a beep.
Since beginning to use the Kinesis keyboard and keypad, I've had no problems at all.
not much different than an adding machine.... Would probably skip this piece and just purchase split keyboard, use current adding machine.
This thing stopped working properly after 9 months of use. The tech support line was useless, they just gave me a ups shipping number to return it. What am supposed to use for the next month? I would not recommend any of their products.
It's a perfectly nice numeric keypad, but many computer desks (including mine) don't have sufficient room to house the Freestyle 2 keyboard pieces, AND a separate keypad, AND a mousepad and mouse. So my keypad is wedged halfway on top of my mousepad, which interferes both with the use of my mouse and with the use of my keypad.
Answer: It uses blue switches. I saw it on Kinesis website. I also own a blue switch keyboard and they feel identical to this keypad. I believe the similar freestyle 2 keypad  uses brown switches. the freestyle 2 keypad almost feel non mechanical. Good thing about those keys is no sound and still feels pretty good. I prefer the non freestyle 2 keypad better. Both good products