MULTI-CODE Garage Door Opener 1097 Four Button Remote Control Transmitter Compatible with all STANLEY garage door openers built from 1982 - 1997. 310 MHZ Frequency - 2 sets of 10 switch code settings. Operates four separate receivers. Battery, Visor Clip and Coding Instructions included. NOT compatible with Stanley SecureCode or Multicode 300 MHz (frequency) garage door opener systems.