Three-level adjustable alarm volume: Supports high, medium, and low volume settings, and can be with one click to meet different environmental needs. 100dB loud alarm: Super-strong sound and light warnings quickly alert family members and neighbors, effectively preventing the spread of hidden dangers. App-based remote control and management: View device status, receive alert notifications, and adjust the alarm volume in real time through the Tu ya app. Automatic low-battery alert: When the battery is low, the app proactively push notifications to avoid missed alerts. Direct WiFi connection without a gateway: No additional Zigbee or Bluetooth gateway is required, connecting directly to a stable and reliable 2.4GHz WiFi network., Manufacturer: Vjsujehgy