Chamberlain 4-Channel Universal Remote Control Transmitter.
Chamberlain remote control (handheld transmitter) is furnished with a special code and can be programmed to all Chamberlain garage door openers and gate openers that are equipped with Chamberlain 433MHz wireless. This elegant transmitter makes you proud to carry on the key chain. Up to four garage door openers or gate openers can be operated with one transmitter. Furthermore, the transmitter is compatible with former Chamberlain models with 433MHz frequency (except model ML510).