Note: The smart ZigBee Tuya siren alarmmust work with Tuya gateway Hub which supports ZigBee protocol. It can't work without Tuya ZigBee intelligent gateway. Features: Enjoy Your Smart LifeAfter connecting with the ZigBee Hub, when you leave home, it will push notification message to you when the siren alarm triggered, so you can discover the danger in time. APP Remote ControlDownload APP "Tuya/Smart Life" from GooglePlay or App Store to add the device to linkage with Zigbee sensors. Home security in your hand all the time. 85dB Loud AlarmIntelligent sound and light alarm, when indoor detector detects danger, the intelligent sound and light alarm sends out 85dB large decibels and flash alarms. It will timely and effectively convey the alarm information to users intuitively. Dual Power SupplyPowered by the included power adaptor or back-up battery. Helps keep your home safe even if the electricity fails. Linkage FunctionIt can linkage with various Zigbee sensors, such as PIR sensors or door sensors, etc., realize multi-function, multi-scene alarm. Specifications: Power Supply: DC5V/1A Backup Power Supply: rechargeable (included) Sound intensity: 85dB Protocol: ZigBee Control Mode: Mobile APP "Tuya/SmartLife" App Support: Android/iOS Operating Temperature: -10 ~ 50 Operating Humidity: 0% ~ 95%RH Package Information: Package Size: Approach. 16 * 10 * 5cm / 6.3 * 3.9 * 2in Package Weight: Approach. 186g / 6.6oz Package List: 1 * Wireless Siren Alarm 1 * USB Cable 1 * User Manual (English) 1 * Set of Mounting Screws 1 * Sticker