Fangrui Product Details 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. Standby Current:61ua-180ua Usb Port:5v/1a Sound Intensity:90db Detection Temperature:-1080detection Humidity:- Wireless Frequency:2. 4ghz Communication Protocol:zigbee 3.0 Wireless Standard:zigbee Ieee 802.15.4 Wireless Range:40m Colour:white Material:plastic Package Contents: 1 * Siren 2-in-1 Sensor Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Little Different