Garage Door Opener Transmitter: Description and Operation

Universal Transmitter:

The HomeLink(R) universal transmitter provides a convenient way to substitute up to three hand-held transmitters with a single built-in device. The universal transmitter:
^ will operate garage doors, gates and home/office lighting and security systems.
^ will actually learn and transmit the radio frequency of up to three hand-held transmitters from any of the systems mentioned above.
^ is an integral part of the left sun visor assembly and is powered by the vehicle battery and charging system.