The product is intended to resemble a normal wall switch and is used to control, via RF, primarily lights. It is mains powered and always listening so is capable of acting as a repeater in Z-Wave network.2 GANG MAINS CONTROLLER MODULE STANDARD CARTON QUANTITY: 1 RF Range up to 75m (open field) Can control up to 64 devices in total Can control either a group or a scene Pre programmed with ALL OFF function and HOLIDAY MODE function Mains powered Mounting Boxes: Flush 35mm