Description: Features: *Tuya ZigBee 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 Wireless frequency: 2. 4GHZ Communication protocol: Zigbee 3.0 Wireless standard: Zigbee IEEE 802.15.4 Wireless range: 40M Package Included: 2 *Siren 2 IN 1 Sensor 2 * Set of Stickers & Mounting Screws 2 * USB Cable 2 * User Manual (English)