Tuya ZigBee T&H&Siren 2-in-1 Sensor: Detects environmental conditions in real-time. Siren alarm exceeds 90DB. Alarm Notification: Receive instant notifications on your smartphone when the siren alarm is triggered and check the log in the app. Widely used in homes, kitchens, offices, etc. Smart Scenarios: Can be integrated with other smart Tuya WIFI products to design and implement smart application scenarios. Ultra-fast response, strong anti-interference capability, extremely low power consumption, and cost-effectiveness. Supports 5V 1A USB port power. Standby current: 61uA-180uA USB port: 5V/1A Sound intensity: 90db Detection temperature: -10-80℃ Detection humidity: 0%-100% Wireless frequency: 2.4GHZ Communication protocol: Zigbee 3.0 Wireless standard: Zigbee IEEE 802.15.4 Wireless range: 40M Color: White Material: Plastic Package Contents: 1 * Siren 2-in-1 Sensor (Note: Only the above package content is included; other products are not.) Note: Light reflections and different displays may cause the color of the item in the image to vary slightly from the actual product. The allowed measurement error is +/- 1-3cm.