The TV B-Gone is a nifty little remote control with only one function: It is able to turn off nearly all European TVs.
TV B-Gone sends nearly all known European turn-off codes. There are many codes on the market, so it takes 69 seconds until all codes are transmitted, but most TVs are switched off in the first few seconds.
The device measures only about 5x4cm. It works with three batteries (CR2016 and CR2032) and they are included.