... For home electric appliances control use This is 1 channel wireless transmitter Technical specification: Battery: 27A 12V Channel: 1CHWe ... 12v voltage working circumstance,100m~10km meters.Our wireless remote control system advantage:I:Wide input voltage:AC90v~AC270v,50Hz ... 1000m,2000m,10kmWe can design/produce 3 different functional wireless remote control systemindividually or design all the 3 ...