Get advance notice of potentially hazardous water leaks with a system that alerts you when leaking water is detected. The Water Bug Leak Detection System can be used with virtually any security/home automation system that accepts a dry contact closure as a signal. Use it with the EnviroAlert Systems, X10 Security System Wireless Transmitters, the JDS TimeCommander Plus or a Sensaphone.This battery-powered version has normally-open contacts only and requires a 9V battery (sold separately).The WaterBug Leak Detection System comes with one surface sensor. This battery-powered version uses one 9V alkaline battery (not included) with approximately one year battery life. Add up to 5 additional sensors (sold separately) to the console if desired. Also available in an AC-powered version.