CHAMBERLAIN model 450, 450-6, 450-9, 450GM residential opener is a 1/2hp chain/cable 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 dip switch on 390. The rail is style is Split T.
The warranty on the garage door opener is 3 years on the motor and 1 year on the remaining opener parts from CHAMBERLAIN.
The model 450, 450-6, 450-9, 450GM is discontinued.
CHAMBERLAIN model 450, 450-6, 450-9, 450GM residential opener owners manual and instructions in PDF format at NO CHARGE!
VIEW / DOWNLOAD by clicking HERE
chamberlain_450_om.pdf
(0.16 MB in English) This requires Acrobat 10 or higher