Multi Code 4120 Wireless Transmitter Remote by Liftmaster

The Multi-Code 412001 is neutral in color, so it's barely noticeable hanging from your visor. Because it's compatible with all Multi-Code receivers and transmitters, it can be programmed to operate both a security gate and a garage door; it's the ideal solution for many homeowners. Operating at 300 MHz with 310 MHz also available, the Multi-Code 412001 features a long-life 9-volt battery that's easy to access; it's contained right beside the DIP switch. https://shopactiondirect.com/product/linear-mcs412001-multi-code-4120-2-channel-visor-gate-garage-door-transmitter/