Compatible with Operators with a PURPLE Square “Smart Button” 315 MHz Works with Chamberlain Operators with PURPLE Antenna Wire 315 MHz Also Compatible with CRAFTSMAN Openers with a “315” on the Remote Control Security + 3-Function, Transmits a New Security Code Every Time Remote is Pushed 100-Billion Codes, Opens One, Two, or Three Garage Doors, Remote has BLACK Buttons This Craftsman 139.53753 remote control is compatible with Craftsman, Liftmaster, Do-It, Master-Mechanic, Raynor, and Chamberlain garage door openers using Security+ ERT technology, and made 2005 and after. If your opener has a purple learn button on the back/side of the powerhead, or the original remote has black buttons, this control should work. Systems with other types of coding will NOT be compatible.