Features: 【Remote Monitoring】Through the mobile APP, you can observe the dynamics of smoke in real time. Make your home smarter, no matter how far away from home. 【High Sensitivity Smoke Detection】When fire breaks out, the sensor will detect smoke sensitively, and send an alarm ringtone, then push notifications to your smartphone to protect people and property. 【80d - B Loud Sound】Once triggered, the red LED will flash with loud high volume alarm sound, louder than 80d - B. 【Excellent Design & Super Quality】Exclusive smoke intelligent algorithm, high sensitivity, no false alarm, strong anti-interference. 【Widely Application】Perfect full buckle patented structure, anti-dismantle bracket, easy to install and clean. Specifications: Power Supply: 2*LR03 DC3V (not included) Standby Current: ≤15u - A Alarm Current: ≤160m - A Alarm Indication: Red led flash Sound Level: 80d - B/M Detecting Area: 20 square meter Alarm Output: WIFI Wireless Type: 2.4GHz Protocol: IEEE 802.11b/g/n APP: Smart - Life/Tuya Operating Temperature: -10°C ~+50°C Operating Humidity: ≤95% RH Item Size: Approx. 8 * 8 * 4cm (L*W*H) Item Weight: Approx. 70g / 2.5oz Package Information: Item Size: Approx. 8.6 * 8.6 * 5cm / 3.4 * 3.4 *2in (L*W*H) Item Weight: Approx. 90g / 3.2oz Note: This product cannot be co-linked with the Smarttings system