CRAFTSMAN / SEARS model 139.53939D residential opener is a 1/2hp belt drive. It is part of the value. This garage door opener has an ac motor on 110vac. A battery backup is not available. The remotes are rolling code on 315. The rail is style is Split Square.
The warranty on the garage door opener is 10 years on the motor and 3 years on the remaining opener parts from CRAFTSMAN / SEARS.
The model 139.53939D is discontinued.
CRAFTSMAN / SEARS model 139.53939D residential opener owners manual and instructions in PDF format at NO CHARGE!
VIEW / DOWNLOAD by clicking HERE
craftsman_139_53939d_om.pdf
(10.32 MB in English, Spanish) This requires Acrobat 10 or higher