Non-contact reversing system: Places an invisible infrared beam across the door opening that causes the door to reverse upward when anything passes through the beam. Incorporates LED lights. Contact reversing system: automatically stops and reverses a closing door when it contacts an object. Timed reverse system: Automatically stops and reverses a door if it fails to close in 30 seconds. Force guard control: Allows users to set the minimum force needed to fully open and close the door. Relay switch monitoring: Stops and reverses the door if a control relay switch malfunctions. STB monitoring system: Stops and reverses a door if something is encountered while it is being lowered. Backwards compatible with all Genie garage door openers with photo eye capability.

• Model 37220R GSTB-BX. Used and compatible with all Genie Garage Door Openers.
• Easy do-it-yourself installation. Easy to use.
• Self-diagnostic Safe-T-Beam system pinpoints specific problems.
• When beam is interrupted, door automatically stops closing, then reverses.