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LiftMaster 971LM Three-Button Visor 390MHz Security+ Garage Door Or Gate Opener Remote Control. Directly compatible with Chamberlain 950CB, 953CB or Sears Craftsman 139.53680 or 139.53681 (00953680000 or 00953681000). Works with LiftMaster, Chamberlain, Sears Craftsman Security+ versions of garage door openers on the 390MHz frequency manufactured between 1997 and 2005 that have the RED or ORANGE learn button. Works with LiftMaster security+ radio receivers on the 390MHz frequency.