Remote control Four channels transmitter, wall mounted GP 12V battery 220V, 50Hz and 110V, 60Hz 433MHZ TOMA Remote controlone,fix and sixteen channel transmitter,Wall mounted transmitterSuitable for roller shutter,roller door,awning,screen,blind and so onWorking voltage: 220V, 50Hz and 110V, 60HzWorking temperature range: -20 to +70 centiguradeWorking frequency: 433MHZ remote control