It supports on/off and dim up/down control of two groups. The product is also capable of facilitating simple associations between other devices.2 GANG BATTERY CONTROLLER Fully portable, can be used from any location in the system Can be selected as the system's Primary Controller RF Range up to 75m (open field) Can control up to 64 devices in total Pre programmed with ALL OFF function and HOLIDAY MODE function Low battery indicator Long battery life of tp to 2 years (under normal operating conditions) STANDARD CARTON QUANTITY: 1 Supplied with wall and back box mounting brackets, batteries and all required fixings. Operating Frequency 919.8MHz Select the appropriate 2 Gang Dimmer Fascia for your Battery Controller Module.