Sears Craftsman 139.53615SR Remote is Equivalent to the 61LM
This Liftmaster 61LM remote is the equivalent remote to the Sears Craftsman 139 model number listed above. It has dip switches inside the battery compartment that you match up with your existing remote to make it open your garage door. There is also a set of dip switches on the overhead opener itself if you no longer have a working remote. It should be easy to find on the garage door opener. This remote operates on a 390 MHZ Frequency, and works on models from 1984-1992 essentially. It has a set of 9 three position dip switches that you match up with your existing opener. A 12V battery and visor clip are included along with instructions. Also, the Sears Craftsman compatible wireless keypad is model number Liftmaster 66LM if you need to get a keypad.