CHAMBERLAIN model WD912K 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 T.
The warranty on the garage door opener is Lifetime on the motor and 1 year on the remaining opener parts from CHAMBERLAIN.
The model WD912K is discontinued.
CHAMBERLAIN model WD912K residential opener owners manual and instructions in PDF format at NO CHARGE!
VIEW / DOWNLOAD by clicking HERE
chamberlain_wd912k_om.pdf
(2.02 MB in English) This requires Acrobat 10 or higher