Several years back garage door openers have been required to use protection sensors to forestall doors from closing on smaller small children. LiftMaster takes advantage of the Protector Method® which tasks an invisible gentle beam over the door opening and immediately opens the door if some thing/an individual crosses it’s http://garagedoorserviceandrepai95107.pointblog.net/The-Single-Best-Strategy-To-Use-For-off-track-garage-door-repair-42191579