GENIE GM3T Garage Door Opener Remote 3 Button GM3T works with all Genie products and brands 390 or 315 MHz frequency. 9 or 12 switch 390MHz formats. Intellicode 1 or 2 390/315MHZ. All CodeDodger formats. OverHead Door 3 position switch formats 390MHZ frequency ONLY Battery, visor clip and programming instructions included. 3 3/8" x 1 15/16" x 1/2".