Auto- Dual Frequency: The replacement garage door opener remote accesses strong, secure signals to minimize interference and improve overall performance. This keychain/visor remote can operate up to 3 garage door openers. Works With: This garage door opener remote is for all Genie IntelliCode and Overhead Door CodeDodger garage door opener. Note: NOT compatible with dip switches. Compatibility List: Compatible with for Genie Remote: G3T-BX G3T-R G3T-A G1T-BX G1T-A O1T-BX O1T-A GITR-3 -1 -2 -3; Compatible with Overhead Door Remote: O3T-BX OCDTR-3 OCDT-1 OCDT-2 OCDT-3. Note: Only for Genie Intellicode & Overhead Door CodeDodger openers (1997+) Easy to Program: Works within 120 feet from the garage door opener for "no waiting" roll-in access. TIPS: Make sure your garage door opener is fully closed before starting remote programming., Manufacturer: Akfldms