Radio 2-channel mini remote control, 43 x 43 mm, 16 mm high. Weighs only 30 grams. It generates energy for radio telegrams with a button press, therefore no battery is needed. Smart Home sensor. The battery-free mini remote control FMH2 features a rocker switch that can send 2 evaluable radio telegrams. The rocker is laser-engraved with 0 and I. This radio remote control can be attached to walls, glass, or furniture using the included adhesive film, just like wireless push buttons. The mini remote control comes with the following engraving: Top 0 (= off) and bottom I (= on).