This LiftMaster CPTK3 is a direct replacement for your Sears Craftsman 139.18791 18791 remote control. If your opener has a RED or ORANGE learn button or if the buttons on the remote are BLUE then is is the correct remote for your opener.
Programming is simple just press the programming button on your opener then press the button on the opener and you'll be ready to go.
This Sears Craftsman 139.18790 18790 mini key chain remote is directly compatible with the following models 390 MHz Security+ remote:
LiftMaster: 91LM, 92LM, 94LM, 96LM, 971LM, 972LM, 973LM, 973W, 974LM.
Chamberlain: 950CB, 953CB, 956CB.
Sears Craftsman: 139.53680, 139.53681, 0953680000 or 00953681000.
-Controls up to 3 different 390 MHz Security+ formatted device
-Includes 3 volt lithium battery CR2032
-Frequency: 390 MHz
-Features rolling code technology
-Dimensions: 2.25" x 1.25" x 0.5" inches inches
-One year manufacturers warranty