Liftmaster Model 971LM

Compatibility list-
Original Liftmaster remote: 91LM,971LM.
Current Liftmaster replacement: 971LM.
Original Chamberlain remote: 950CB.
Current Chamberlain replacement: 971LM.
Original Sears replacement: 139.53681, 139.53680.
Current Sears replacement: 971LM.

Universal receiver compatibility:Security+ models-335LM,535LM,412HM,635LM.

Compatible with Liftmaster garage door operator models:
1240R, 1245R, 1246R, 1255R, 1265R, 1000SDR, 2000SDR, ATS211R.

Compatible with Chamberlain garage door operator models:
1200, 2200, 4200, 6200, 7220, 8200, 9200, 4620, 4640, 9902.

Over 100-billion code rolling code techknowledgy. Compatible with all Security+ models. Operates one Liftmaster, Chamberlain or Sears opening device equipped with Security+ technology.