The Safety Photocell Infrared Photo Eye Sensor is easy to install on gate openers, driveways and garages Includes (1) photocell, (1) reflector, (1) bracket and (1) set of nuts and bolts Creates an invisible security barrier; stops gate from closing on a vehicle or person by stopping and reversing Easy to install Detection Method: Retro-Reflective; Angle: approximately 1.5 degrees Normally open and closed volt free relay contacts rated up to 1A 250V AC Maximum sensor range: 40 Feet Supply Voltage: 12-36 VDC or 12-24 VAC Sensor dimensions: 1 x 3 x 2 inches Reflector dimensions: 4 inches diameter Protection Degree: IP66