PIR-235 Dual-Element Motion Detector - PIR sensor - tamper switch inside, NC output - auto temperature compensation - detection speed: 0.15-15m/sec - working voltage: 9V DC -16V DC - current consumption: 17mA at 12V DC - working temperature: -10-+60 degrees Celsius - working humidity: 0-95% - installation height: 2.0-2.5m - detection range: 12 x 12m at 2.0m height - size: 87 x 62 x 40 mm