Remote Control.Fully portable - can be used from any location in the system Can be the system Primary Controller Up to 75m RF range (open field) Can control up to 64 devices in total Can control up to four groups and four scenes Maximum of 64 devices per group or scene Battery-powered Low battery indicator Long battery life, up to two years REMOTE CONTROL STANDARD CARTON QUANTITY: 1 Operating Frequency 868.4 MHz Select the appropriate 1 Gang or 2 Gang Dimmer Fascia for your Battery Controller Module. Operating Frequency 868.4 MHz