Here's mine:

A sort-of intercom system, where you have a base station and about 9 channels on it. It comes with 9 pads too, each powered by a small watch battery and has a beeper on it. You can stick the pads on devices such as phones, remote controls, watches, assorted tools, etc. Anyway, if you ever lose it, just press the number on the base station and the corresponding pad with that number will beep and it will be easier for you to find it.

: patent :