There is a reason for...
Not using Wireless KB's and Mice.
Other than the having to replace batteries just when you need to use the thing urgently.
Besides, I have yet to find a wireless KB that can stand up to the hammering I give them. I've had a couple of old DELL KB's (USB) that are build like the IBM's ones of old. Had them 7+ years and cost me £5 each at a computer fair. Still going strong.