Trigger Alarm: Requires setting up a scene for intelligent linkage with other Tuya smart devices Alarm Methods: Voice Alarm, Light Alarm, Combined Voice and Light Alarm Used as Doorbell: Requires creating a scene for linkage with other Tuya smart devices Annular Night Light(RGB) Alarm and Night Light On/Off Records. Push Alarm Notifications to the App Specifications: Wireless Protocol: Wi-Fi IEEE 802.11 b/g 2.4GHz Model Number: --WSA Hub Required: No Power Supply: USB-C (5V/1A) Battery Standby Time after USB Power Disconnect: 8 Hours Alarm Methods: Trigger Alarm, Make Sound and Light Alarm Volume: Adjustable with Four Levels - High, Medium, Low, Mute Maximum Volume: 90 dB(1m range) Alarm Duration: 1-60 Minutes Adjustable LED Night Light(RGB): ON/OFF Control, Color & Brightness Dimmable Operating Temperature: -20-60℃ App Name: Smart Life, Tuya Smart Mobile OS Required: Android 4.4 or Later, iOS 9.0 or Later Dimensions: 80mm x 80mm x 35mm LED Annular Night Light: Physical Button and App Control Night Light Power Button: A short turns the night light on/off, a long for 5 seconds resets the siren RGB Color LED(4pcs) Light Settings: Color and brightness can be adjusted in the App Friendly Reminder: This alarm siren should connect to DC5V/1A power source all the time. This full battery can only last for 8 hours if DC5V power disconnects. The battery is a backup power during power outage, not for long term power supply. Colour:As Shown Material:Plastic Package Contents: 1 * WiFi Siren Alarm 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 from the real thing. The measurement allowed error is +/- 1-3cm.