Feature: 1. APPLICABLE SCENES: Universal digital frequency infrared fence detector, suitable for indoor and outdoor use, used for window, balcony, garage, villa, school, supermarket, office building, etc. 2. STABLE TO OPERATE: The light grating detector adopts excellent main chip and sensor, with a wide working voltage of 8‑33VDC, ensuring stable operating. 3. MULTIPLE FUNCTIONS: Adopting digital frequency modulation demodulation technology, infrared transmission digital signal, automatic focusing circuit, acousto optic calibration and catch. 4. WORKING PRINCIPLE: After installation, when someone or other intruder comes into contact with 2 or more adjacent beams, the alarm output triggers the infrared barrier detector. 5. INTRUSION ALARM: Smart detection technology can identify animal passing through without alarm, with tamper resistance, thread cutting resistance, and infrared interference prevention. Specification: Item Type: Infrared Fence Alarm Material: PC, Aluminum Alloy Working Voltage: 8-33VDC Infrared Beam: 4 Working Current: Transmitter I ≤35mA, Receiver I ≤45mA Response Speed: ≤80ms Response Time: ≥1.5s Feature: 4 Channel PWM Alarm Output: NC NO Relay Output Alarm Method: Wired or Wireless Optical Axes Adjustment: Horizontal 180° Auxiliary Function: Power indicator light, alarm indicator light, RT thermal indicator light, buzzer. Package List: 1 x Transmitter1 x Receiver1 x User Manual4 x Long Screws4 x Expansion Tubes4 x Short Screws