Liftmaster 8550W  Belt drive DC motor with built in battery backup.

Comes with MyQ technology to connect to a smart phone,  2 remotes, external keypad.

Lifetime warranty on the motor and belt, 5 year parts warranty 1 year battery warranty, and a 1 year labor warranty.

Product Specifications Sheet

Liftmaster 8365  1/2HP Chain Drive unit.

Comes with MyQ technology to connect to a smart phone and 2 remotes,

1 year parts warranty, and a 1 year labor warranty.

Optional keypad for an additional charge.

Product Specifications Sheet

Liftmaster 8500  Side mount opener 

Comes with MyQ technology to connect to a smart phone,  1 remote

Lifetime warranty on the motor , 5 year parts warranty 1 year battery warranty, and a 1 year labor warranty.

Battery backup capable.

Product Specifications Sheet