It has three levers.
How to unlock garage door remote.
A cord should be attached to the back and pulling the cord will free the garage door from the opener and you can open the garage door manually.
A lock cylinder to unlock the sliding bolt from the outside.
We all have those rare or not so rare occasions where we lock ourselves out of our house.
The sliding bolt which locks the door.
This snaps into place when the bolt.
A vertical spring loaded release lever next to the flat slot.
Insert the key which you may have and the lock should come out when turned.
While you could learn how to pick your own locks reader ilovetofu shows us how to open a garage door in.
This video will show you how for most garage door openers including liftmaster chamberlain sears.