Features: *Tuya ZigBee T&H&Siren 2 IN 1 Sensor: Detecting in the environment in time. Siren alarm louder than 90DB. *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: 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: Zigbee IEEE 802.15.4 Wireless range: 40M Package Included: 1 *Siren 2 IN 1 Sensor 1 * Set of Stickers & Mounting Screws 1 * USB Cable 1 * User Manual (English)