... Portable Roller Shutter transmitterRoller Shutter transmitter , Awning remote control , Projection Screen Transmitter , Switchremote control set ,switch,transmitter Suitable for rolling door,garage door ... ,roller door,roller shutterawning,screenReceiver and transmitter series Working voltage: 220V, 50Hz and 110V, 60Hz Working temperature range: -20 to +70 centigurade ...