Elivco ZigBee Smart Siren is intelligent device, that will warn you from danger, like thieves!
The siren will connect to your ZigBee bridge (it won't function without it) and then you can rely on 90db speaker.
The device also contains temperature and humidity sensor.
To control the siren remotely, you will need to have smartphone with downloaded app Tuya Smart or Smart Life (G Play / App Store)