The LiftMaster LMRRUL monitored retro-reflective photo eye provides reliable safety sensing for commercial garage door systems with a detection range of up to 50 feet. Its wider beam angle makes alignment easier, while the built-in heater helps maintain dependable performance in changing weather conditions. An alignment strength indicator helps confirm proper setup, and power is required on only one side of the installation. The unit includes a steel sensor hood, durable reflector hood, 10-foot wire, brackets, and mounting hardware. NEMA 4X rated for strong weather resistance and designed to meet UL 325 safety standards.