Protect your home from potential disaster from leaking water with this 90-decibel water siren. This battery-operated leak sensor will sound an alert the instant it detects a water leak. For maximum security when you are away from home, connect this sensor to a Deluxe Freeze Alarm (sold separately) so that you can receive alerts to your mobile or business phone. The Water Siren Plus comes equipped with normally open and normally closed contact outputs, which means you can integrate it into an existing hardwired security system. The Water Siren Plus is powered by a 9-volt battery (sold separately); a low-battery alert will notify you when its time to replace the battery.