Genie G3T-R 3-Button Remote with Intellicode Security Technology/Controls Up to 3 Garage Door Openers, 1 Pack Intellicode security technology: this technology changes the access code for entry each time the door is activated, preventing unauthorized access Auto-seek dual frequency technology: accesses strong, secure signals to minimize interference and improve overall performance Compatible with homelink and car 2 u systems: use your Genie G3T-R 3-button remote to train your built-in vehicle remote system Easily programmable: remote can operate up to 3 Genie garage door openers manufactured 1997-present. Up to 2 openers manufactured 1995-1997 Simple storage and use: includes visor clip, battery and instructions. Can also fit on keyring if desired