Cebek TL-325 is a two channel 12Vdc transmitter for Group 3 Cebek RF remote control receivers. It uses a carrier frequency of 433.92MHz. Communication between transmitter and receiver is established via a data frame with a security code, matching transmitters and receivers that prevents the connection from any other RF equipment. Requires an antenna to emit with maximum power and efficiency, this must be installed before operating the remote control. You can use a rigid copper wire 1mmØ, connecting to the terminal marked antenna. For longer range antennas use Cebek C-0509 rigid aerial.