... or DC6v~12v voltage working circumstance,100m~10km meters. Our wireless remote control system advantage:I:Wide input voltage:AC90v~AC270v,50Hz/60Hz ... ,500m,1000m,2000m,10kmWe can design/produce 3 different functional wireless remote control systemindividually or design all the 3 functions together.One is ... /B/C is OFF;Use field: Electric fan wind speed wireless control Wireless Remote Lamp Socket