Liftmaster 87802 Battery Back Up Chain Drive Wi-Fi 12V DC Without Rail (8580WLB)
LIFTMASTER 8580WLB (NOW 87802). Elite 12V DC Battery Back up Chain Drive. NEW ELITE 12V DC BATTERY BACKUP Chain DRIVE. THE STRONGEST MOTOR AND I-BEAM RAIL SYSTEM TO LIFT THE HEAVIEST DOORS. MOTOR HEAD ONLY, WITHOUT CHAIN RAIL.