DIGI-CODE Garage Door Opener 5042 One Button Mini Remote Control Transmitter Compatible with all STANLEY garage door openers built from 1982 - 1997. 310 MHZ Frequency - 10 switch code settings. Mini key-chain remote 2 1/2" x 1 3/4". Battery, Key Ring and Coding Instructions included. NOT compatible with Stanley SecureCode garage door opener systems.