Features: Wide Application – Compatible with all gate openers. Suitable for access control systems, parking lots, perimeter fences, doors, windows, balconies, garages, passages, and other locations. Ideal for security system installations in schools, office buildings, hospitals, residential yards, and similar environments. Stable Signal Transmission – Equipped with a high-power infrared transmitter and receiver. The transmitter emits a reliable, invisible infrared beam up to 65 ft (20 m). When the beam is interrupted, the relay outputs a switch signal. Waterproof & UV Resistant – Fully sealed, waterproof, and dustproof egg-shaped housing with a sunlight-filtering design allows operation in harsh environmental conditions. Designed for easy installation. Reliable Performance – Incorporates advanced security technology to ensure dependable protection. The infrared photocell beam enables the gate to stop or reverse automatically when an obstruction is detected, enhancing safety for people and property. Easy Installation – Mount each unit in sing positions to create an infrared detection zone between the transmitter and receiver. When an object or person crosses the detection area, the sensor sends a signal to the security alarm host (not included). Specifications: Color: Black Material: Polycarbonate (Waterproof, UV resistant) Detection Range: Outdoor: 20 m; Indoor: 30 m Response Time: 30 ms Infrared Frequency: 1.92 kHz Wavelength: 940 nm Operating Voltage: DC 12–24 V Input Current: Receiver 15 mA, Transmitter 30 mA Relay Output: A1 36 W Item Size: 76 × 49.2 × 21.6 mm / 3.0 × 1.9 × 0.9 in Package Includes: 1 Pair Infrared Sensor (Transmitter and Receiver)