Linear Act-34B 4-Channel Keychain Transmitter, Black, samsung

Linear's ACT-34B is a four-channel device supplied with a quick-disconnect key ring and a unique 10-second time-out feature. Each transmitter is factory preprogrammed with one of over 1,000,000 codes, virtually eliminating the possibility of code duplication. No unauthorized person can gain access by reprogramming a transmitter because the receiver learns each specific code. Block coded transmitters are factor programmed to a sequential series of transmitter id codes and facility codes can be selected to further customize the system.