Features:*Tuya ZigBee THSiren 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-180uAUSB port: 5V1ASound intensity: 90dbDetection temperature: -10 ~ 80Detection humidity: 0% ~ Wireless frequency: 2. 4GHZCommunication protocol: Zigbee 3.0Wireless standard: Zigbee IEEE 802.15.4Wireless range: 40MPackage Included:1 *Siren 2 IN 1 Sensor1 * Set of Stickers Mounting Screws1 * USB Cable1 * User Manual (English)