1、Unit doublet square sensor with low noise and high sensitivity. 2、Internal 465 self-testing program. 3、Red LED to alarm with continuous flash for 3 seconds. 4、Two stage autopulse number adjustment, temperature compensation and metal shielding. 5、Ceiling installation equipped with passive infrared motion detector, greatly suitable for the anti-theft use. Features: Unit doublet square sensor with low noise and high sensitivity. Internal 465 self-testing program. Red LED to alarm with continuous flash for 3 seconds. Two stage autopulse number adjustment, temperature compensation and metal shielding. Ceiling installation equipped with passive infrared motion detector, greatly suitable for the anti-theft use. Specification: Condition: 100% Brand New Material: ABS Color: White Sensor: Unit doublet square, low noise, high sensitivity Signal Processing: Two stage autopulse, temperature compensation, metal shielding Detection Speed: 0.2m~7m/s Working Temperature: -10C~+50°C Power Input: Max.18MA, DC9-16V Lens: LODIFF lens Detection Range: 7*8.5m Installation Height: 2.2-4.5m Partition: 12+12+12+12+6+1=55 Alarm Display: Red LED, continuous flash for 3 seconds Alarm Output: Normally open 28V DC, 0.15A Tampering Output: Normally open 28V DC, Max.0.15A Humidity: 95% Package Weight: Approx.91g/3.2oz Package List: 1 * Detector