Liftmaster 41A5034 Snappy Photo Eye Sensors Garage Opener Craftsman Chamberlain

041A5034 is a Safety Reversing Sensor Replacement Kit. For use with all Garage Door Openers made after 1997. This is a required safety device that MUST be connected and aligned correctly before the garage door opener will move in the down direction. Complete kit includes: Sending sensor (with an amber LED), receiving sensor (with a green LED), 2-conductor wire, (5) wire connectors, (2) wingnuts, and (2) 1/4-20" round head bolts