Features: 1) Intelligent microcomputer control, automatic temperature compensation, sensitivity may move 2) Anti-white light and electromagnet interference 3) Guards against the pet and open function 4) Wall-mounted installation Specifications: 1) Working power: 9V battery 2) Battery span: 1 year 3) Working environment: -10 ~ 50°C 4) Transmission distance: spacious zone: ≥100m 5) Anti-bright light interference: 8,000 lux 6) Detecting distance: 110° 8m 7) Installation: wall-mounted