Fangrui Product Details 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: 1 *siren 2 In 1 Sensor 1 * Set Of Stickers & Mounting Screws 1 * Usb Cable 1 * User Manual (english) Designed For Modern Living