The HomeLink® System is a universal transmitter fitted to the underside of the interior rear view mirror. This transmitter can be programmed to operate up to three home or office wireless controlled systems, such as garage doors, automatic gates, or security lighting. By replacing the individual remote control units normally required for each system, the driver no longer needs to search the car interior for the correct handset when needed. For vehicles with electro magnetic mirror only. HomeLink® is a registered trademark of Gentex Corporation.