This device is for people who have no other entrance to there garage other than through the roller garage door, the unit comes from the motor down the wall and through either forwards or sideways and has a plate with a lock on the outside for security. This will allow you to manually wind the door open from the outside if there was a power failure but please be aware this unit is fitted the same side as your power supply. Read less

Battery back-up unit to supply back up power to your RD55 or Rd77 Single garage door in the event of a power failure. Read less

Battery back-up unit to supply back up power to your Large or Double RD77 garage door in the event of a power failure. Read less

Manual handle for internal manual override works with RDWSELL winding stem Read less