Feature: 1. Automatic Gate Stop: This infrared sensor kit for the door opener will auto stop your gate when an obstacle is detected, ensuring maximum protection for pedestrians and property. 2. Sensitive Detection: The garage door photocell sensor has a 10 ° tracking angle and can send 940nm 1.9 kHz infrared beam signal to detect any obstacles on the road within 50ms, providing lightning fast detection. 3. Great Durability: The compact single beam photocell sensor adopts IP44 waterproof material and sturdy shell, which can withstand harsh outdoor conditions and is durable. 4. For Higher Security: The infrared security sensor has a sensor range of 30m and can work perfectly in garages, parking lots, defense walls, balconies and other places. 5. Easy Installation and Setting: The provided screws make installation and setting easy, so you can better enjoy a more relaxed, safer and more convenient access control experience. Specification: Item Type: Door Opener Infrared Sensor Material: ABS Voltage: 12-24V Detection Distance: Approx. 30m / 98.43ft Frequency: Pulse Wavelength: 940nm. Package List: 1 x Receiver1 x Transmitter2 x Adhesive Tape2 x Short Screw4 x Long Screw4 x Wall Plug1 x User Manual