Metronic Zapbox Plug-in 2 TNT Adapter (Electronics)
My comment in 2011: Smaller than a box (about 10x5x1 cm), invisible, just an adhesive sensor on the TV, and the top, fast remote control. In 2014 I will add that I had bought 4 for 4 TV in guest rooms. There are no more that 1 only one that works ...