Features:  - Compatible with Tuya/Smart Life App:Simply use your mobile phone to control the Smart Siren Alarm Sensor by Tuya or Smart Life App.   - Remote Control: Even if not at home can also detect the situation at home at any time.  - Rapid Alarm:Rapid alarm just five seconds , the alarm time is shortened,loud enough to let you know the first time.  - Information Push: When the smart device is triggered,it will Intelligent inkage the alarm immediately and send message to your mobile APP remotely.  - Charging Method:Dry cell * 2 and USB charging.  - Intelligent linkage PIR sensor:The PIR sensor detects the movement of human, immediately linked to the alarm, and sounded a siren to remind you of someone invading.  - Intelligent linkage smart Door & Window sensor: Install the 'door & window sensor', when someone opens the door or window, it will immediately linkage the 'smart alarm' and sound the siren to remind you of someone invading.  - Intelligent linkage alarm:Set intelligent linkage with smart temperature and humidity sensors . When the temperature and humidity of the room is too high, immediately intelligent linkage alarm, and issued a siren to alert you.    Specification:  Working current : 200MA;  Standby current : 20MA;  Wireless range : 30m;  Working humidity : 0~90 % RH;  Wireless protocol: WIFI 2 . 4GHz / IEEE 802 . 11 / g / n;  Working temperature : -10℃-50℃;  Power supply mode:USB power supply 5V;  Battery power supply : CR123A-3V * 2;    Note: The power consumption of this product is relatively high ,USB power supply is recommended.    Package included:  1 x Alarm Sensor;  1 x USB cable;  1 x Cover;  1 x Bracket