The radio dimmer transmitter can be connected to standard buttons. Supported functions: On, Off, dim. Depending on the button used, two radio dimmer receivers can be controlled separately via one transmitter. Multiple receivers can be programmed to one transmitter, or multiple transmitters can be programmed to one receiver. Suitable for the following radio dimmer receivers: EFDP23400 and EFD12244X5A. Operated via 1x CR2430 3V battery (not included).