CHAMBERLAIN model 9902 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 390. The rail is style is Split Screw.
The warranty on the garage door opener is Lifetime on the motor and 1 year on the remaining opener parts from CHAMBERLAIN.
The model 9902 is discontinued.
CHAMBERLAIN model 9902 residential opener owners manual and instructions in PDF format at NO CHARGE!
VIEW / DOWNLOAD by clicking HERE
(1.05 MB in English) This requires Acrobat 10 or higher