Designed to provide indoor alerts for various events in your Z-Wave system, the Aeon Indoor Siren features five different alert tones, and can double act as a door bell. Each alert tone sounds at up to 106dB, ensuring that you hear it from anywhere in your home. The siren also has three LEDs for visual alerts. It plugs into a standard outlet and constantly recharges a built-in backup battery. Even if the power goes out, the siren will remain powered.