Note: This smoke detector can't work independently, must work with alarm host.Overview:Wired infrared photoelectric smoke sensor is a non-coding type device that detects smoke, typically as an indicator of fire. Commercial, industrial, and mass residential devices issue a signal to a fire alarm system, while the smoke sensor is triggered, it will transmit signal to alarm host to inform you with red LED indication. Widely used in home, factory, school, shop, offices, villas, residential areas where fire prevention alarm is needed.Specifications:Working voltage: DC9-24VAlarm Current:≤20mAStatic Current: ≤2mAAlarm indicator: Red LEDAlarm Output: NC/NO Optional Metal shield anti-RFI: 20V/m-1GHzCoverage area:80㎡(space height: 6m~12m); 60㎡(space height: ≤6m)Operating Temperature: -10°C ~+50°COperating Humidity: ≤95% RHItem Size: Approx. 10.4 * 10.4 * 5.6cm (L*W*H)Item Weight: Approx. 170g / 6ozPackage Information:Package Size: Approx. 11 * 11 * 6cm / 4.3 * 4.3 * 2.4inPackage Weight: Approx. 207g / 7.3oz Package List:1* Smoke Alarm1* User Manual