1. Function: trigger alarm, make sound and light, remote on/off via APP 2. Automatically restore the previous settings with memory function when network or power off reconnecting 3. Battery: CR123Ax2 / 3V (not included) 4. USB Power supply: 5V/1A 5. Volume: 90db 6. Working Temperature: 0 - 40 degrees Celsius 7. Working humidity: 20% - 85% 8. Wireless frequency: 2.4GHz 9. Network range: 40m 10. Wireless protocol : Zigbee 3.0 IEEE 802.15.4 11. Size: 68mm x 68mm x 33mm
