NEO NAS-AB02W WiFi USB Siren Alarm Sensor for Home Alarms Security

1.Multiple Sound Selection Sound intensity:120 dB
2.Wireless Type:2.4GHz, 1T1R
3.Protocol:IEEE 802.11b/g/n Wireless Range:45m
4.Free app:Tuyasmart or Smart Life.
5.Support systems: Android and IOS.