Hi Kristoffer,
I would think most any should work including wireless. The one listed in the help is the only one we've tested.
http://dynomotion.com/Help/KMotionCNC/KMotionCNC.htm
Wireless is use-at-your-own-risk. They do a one-way transmit on a button down and another transmission on button up. So after a button is pushed down it is impossible to differentiate between an Operator holding the button down or a loss of battery or signal. But I have never experienced a problem.
Regards
TK