Feature: 1. INTRUSION ALARM: When an intruder comes into contact with the beam, the infrared detector will be triggered, safe and reliable. 2. INTELLIGENT DETECTION: Our infrared sensor can intelligently recognize small animals and allow them to pass without alarm. 3. MULTI FEATURES: This infrared detector has functions such as tamper resistance, cutting resistance, and infrared interference prevention. 4. RELIABLE MATERIAL: Made from ABS material, this infrared sensor has high density, high temperature resistance, strong anti UV, ensuring service life. 5. WIDE USAGE: This infrared detector alarm is suitable for villas, factories, residential areas, and schools to prevent strangers from invading. Specification: Item Type: Infrared Beam Sensor Material: ABS, PC Voltage: AC12-18V DC12-24V Detection Speed: 50-700ms Alignment Angle (Horizontal): 180° (±90°). Package List: 1 x Transmitter1 x Receiver2 x Installation Accessories4 x Screw4 x Rubber Ring1 x Instructions