EMX NIR Retro-Reflective Photo Eye with 3 inch Reflector Can be used as a reversing sensor for commercial overhead doors, gates and parking barriers Flexible Voltage 12V AC/DC to 240V AC. Watertight Package, 30 feet range, 6 foot cord Bracket and Mounting hardware included. Two LED Indicators, Sensitivity adjustment Compact water-tight design allows for outdoor installation Mounting hardware and indicators make it easy to install