Mouse4
Nico shows you how to boost the RF of a cheap wireless mouse –

“While shopping at Microcenter, I found a “bargain” wireless mouse and keyboard combination on sale for $12.99. I wanted to add something like this to my media center and the price was really low so I decided to give it a try. The first attempt at using this proved that you really do get what you pay for. Both the mouse and keyboard work fine if they are only a foot or two from the receiver, however, the mouse stops working intermittently as the range is increased. I opened the receiver up and noticed that it was an inductively coupled system running at around 27MHz.” [via] – Link.