Specification Number of Beams: 2 beams Install Distance(Max.) Outdoor: 60m/ Indoor: 300m Dtection Mode: 2 beams blocked simultaneous Optical Source: Infrared digital pulse beam Relay Contact Output: NO.NC Response Speed: 50 ~ 700msec Contact Rating Output: AC/DC30V 0.5AMax Operation Temperature: -25 °C - 55 °C Operation Humidity: 5% - 95% RH (relative humidity) Power Supply: DC 13.8 ~ 24V AC 11 ~ 18V P ? 15W Product Feature 1.The sensor has a built-in laser beam alignment system that speeds accurate, reliable positioning. 2.Ensure the safety of your property by adding this perimeter-style photobeam sensor to your security system. Package Content 1 x Laser detector laser alarm beam sensor(1x transmiter, 1x receiver) 1 x Installation accessories(Including screws) 1 x Operating instruction.