Seco-Larm E-931-S45RRQ Retro-Reflective Photoelectric Beam Sensor, Compact Size, Pre-Wired 6-Foot Cord, Adjustable Response Time and Sensing Range, Bracket and Hounting Hardware Included Compact Size Bracket and mounting hardware included for both sensor and reflector Safety sensor for garage doors or outdoor gates Adjustable response time and sensing range Pre-wired 6-foot cord