The device has the features of environmental-friendly￡? safety and easy installation. It can reflect the low voltage automatically to help the GSM alarm to send low voltage message to users. The product is suitable for housing estate￡? villa￡? factory￡? warehouse￡? office building and so on. <br> <br> <strong>Features:</strong> <br> * Anti-burnt cover. <br> * LED ON/OFF optional. <br> * Auto temperature compensation. <br> * SMT design￡? high RFI/EMI immunity. <br> * Alarm delay time optional. <br> <br> <strong>Specifications:</strong> <br> Working frequency: 433MHz <br> Alarm current: ?ü20mA <br> Static current: ?ü60uA <br> Under Voltage Indicator: Red LED <br> Emission Distance: 50-100m/164-328ft(in open air) <br> Detection Range: 7-10m/2.76-3.94ft <br> Working temperature: -20?? to 55?? <br> Installation Way: Wall hanging <br> Detection Degree: 110??/ 60?? <br> Encoding Type: 1527 <br> Package Size: Approx. 6.3 * 4.3 * 12.8cm / 2.48 * 1.69 * 5.04in( L * W * H ) <br> Total Weight: Approx. 115g/4.07oz <br> <br> <strong>Package list:</strong> <br> 1 * PIR Detector￡¨Battery Included ￡? <br> 1 * Mounting Bracket <br> 1 * Accessory Bag <br> 1 * User Mannual