The product is passive infrared detector with high stability. It has adopted advanced technology in signal processing and provided superhigh detection ability and anti error alarm. The detector will detect movement of human automatically when intruder passes through the detection area, and it will send out alarm signal to alarm host if there is movement. The product is suitable for the safety of residential house, villas, factories, markets, warehouse, office building etc. Features: Small and beautiful, ceiling installation, easy to install. No dead angle monitoring with 360 degree detection angle. The detection distance is up to 8M. Manufactured by 4SMT process, resisting RFI and EMI interference. Motion detection. The detector will detect movement of human automatically when intruder passes through the detection area, and it will send out alarm signal to alarm host if there is movement. Alarm output NC/NO optional, adapt to different alarm host. Omnidirectional automatic temperature compensation,avoiding detection error. Adopt advanced technology in signal processing and provided superhigh detection ability and anti error alarm. Energy saving and environmental protection. Ultra low power consumption, no radiation. Flame retardant ABS shell, Stable and safe performance . Three-level pulse counting can be adjusted to facilitate different environments. Specifications: Color: White Material: ABS Working voltage: DC9-16V Consumption current: less than equal 18mA (at DC12V) Working temperature: -10 ℃ to +50 ℃ Installation: Ceiling installation Installation height: about 2.5m Detection distance: 8m Detection angle: 360 degrees alarm output: normally closed / normally open optional tamper switch: normally closed Size: 8.2 * 2.4cm/3.2 * 0.9in Pacakge Weight: 67g/2.4oz Package List: 1 * Infrared Detector 1 * English Manual 1 * Installation Kit