Early detection of fire 360 wide-area sensitive detection adopts self-developed sensing design, which can sensitively detect smoke particles generated by fire and trigger alarm when detecting fire at the first time. The high-pitched alarm sound is loud and quick to detect fire smoke and sound the alarm quickly. The high-pitched alarm sound is about 85 decibels and has strong penetrating power. It allows nearby people to hear the alarm sound in time and take corresponding protective measures. The mobile APP controls the APP SMS notification and confirms that there is no danger. The alarm can be cleared in the APP. It is recommended for the installation location that the alarm can be installed on the ceiling or tilted; if it needs to be installed on a tilted or diamond-shaped roof, the tilt angle should not be 45, and the distance is preferably 50cm. Input voltage:DC3VLR03 Quiescent current:less than equal 35uA Alarm current:less than equal 100mA Low voltage:less than equal 2.4V Alarm sound pressure:85dB/1m Zigbee standard:IEEE802.15.4 Working frequency:2.405 - 2.480GHz Detection range:20m Installation : ceiling installation Working temperature:10 - +50 Working humidity:maximum 95%RH Colour:White Material:Plastic Package Contents: 1 * Smoke Detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.