Stinger 300MCD21V garage door opener visor sized remote is a 10 dip switch, 300 MHz remote that is compatible with Multicode. ONLY Operates with Linear Multi-Code receivers and transmitters on 300mhz with 10 dip switches.(This is not for Genie, Liftmaster, Sears, Raynor, Wayne Dalton, motor head will say Linear) Test/operate LED. Gray case Frequency: 300 MHz. Visor clip and 12 V battery included.