The great mini key fob unit from Liftmaster is a direct replacement for your Sears Craftsman 139.18191 18191 remote control. If your opener has a PURPLE learn / SRT button or if the buttons on your old remote control are BLACK this unit will work with your opener.
Programming is simple, just press the program button on the actual opener then the button on the remote and your ready to go.
This Sears Craftsman 139.18191 18191 compatible unit will work with the following models:
-LiftMaster Remote Controls: 371LM, 373P, 372LM, 373LM, 374LM, 370LM
-LiftMaster garage door opener model numbers: 3595, 3585, 3575, 3500, 3280, 3265, 3220, 3255, 3245, 3110, 1356, 1355, 1346, 1345, ATS2113X, ATS2113X-CX, HCT501130, LGO50113O, LGO50113L, LGO50113R, LGO50113XR
-Sears Craftsman 139.53752, 139.53753, 139.53910D, 139.53914D, 139.53920D, 139.53930D, 139.53985D, 139.53990D, 139.53992D, 139.53993D, 139.53997D, 53753 and 139.5314D
-315 MHZ Frequency, over 100 billion codes with code rotating technology
-Single channel transmitter
-Compatible with models manufactured from 2005 to present day
-Lithium battery (5 years life w/normal use) included
-Dimensions: 2.25" by 1.25" by .5" inches