There are already plenty of smart cameras that let you keep a close eye on your home. Sometimes you simply want to keep an ear out for unexpected sounds. The Earzz can help. It is an app connected sound monitor that alerts you to sounds in your home. It can alert you to appliances beeping, water running, baby sounds, and everything in between.
The companion app is available for iOS and Android devices. You can add your devices and turn it on/off on your phone. You can also see what sounds you want this sensor to listen to. Multi-room listening is supported. Each device can alert you to up to 3 sounds.[where to get it]