2 in 1 Smoke and Carbon Monoxide Alarm Dual Sensor Smoke CO Alarm JKD512COM Complies with UL 217 UL 2034 Standards

Note: Please do not install it in the kitchen Detection gas: smoke + carbon monoxide Power supply: 3 * 1.5VAA battery Power consumption: ?3W Working temperature: 0 ? -55 ? (32 ? -131 ?) Working humidity: ?95% RH Alarm concentration: 2500PPM (± 1500PPM) 200PPM (± 50PPM) Alarm sound pressure: 70dB Alarm mode: sound and light alarm Sensor: electrochemical sensor + infrared sensor Appearance size: ?104mm * 104mm * 39mm (?4in * 4in * 1.5in) Product installation: 1. This product should not be installed in the following places: A). Places where smoke stays under normal conditions B). Locations with relative humidity greater than 95% C). Places with large dust, water mist and oil mist pollution D). Places with high wind speed (greater than 5 m / s) 2. Put the battery into the battery compartment correctly according to the marked positive and negative polarities. 3. Choose a suitable location, generally installed on the ceiling in the center of the detection space, and use the installation screws to fix the detector base to the selected installation location.