Note: Can NOT working stand alone, MUST work with our Tuya ZigBee Hub or other ZigBee Hub based on Tuya Platform. Features: *Tuya ZigBee T&H&Siren 3 IN 1 Sensor: Detecting temperature and humidity in the environment in time. Siren alarm louder than 90DB. *APP Real-time Temperature and Humidity Report: With the gateway and cloud platform docking, perception of temperature and humidity changes and real-time report to the users phone. *Alarm Notifications: Smart phone will get instant notifications when siren alarm triggered and check the log on APP. Widely used in home, kitchen,office, etc. *Smart Scenarios: It can also be combined with other smart WIFI products based on Tuya to design and implement smart application scenarios. *Ultra-fast response, anti-interference ability, ultra-low power consumption and cost-effective. Supporting 5V 1A USB port power. Specifications: Type: T&H&Siren 3 IN 1 Sensor Power Supply: 2 * CR123A 3V (not included) Standby current: 61uA-180uA USB port: 5V/1A Sound intensity: 90db Detection temperature: -10 ~ 80 Detection humidity: 0% ~ 100% Wireless frequency: 2. 4GHZ Communication protocol: Zigbee 3.0 Wireless standard: IEEE 802.11 b/a/n Wireless range: 40M Material: ABS Item Size: 68*68*38mm Item Weight: 63g Package Information: Package Size: Approach. 9.8 * 8.8 * 5cm / 3.9 * 3.5 * 2in Package Weight: Approx. 109g/3.8oz Packing List: 1 * Temperature&Humidity&Siren 3 IN 1 Sensor 1 * Set of Stickers & Mounting Screws 1 * USB Cable 1 * User Manual (English)