Honeywell Home Wi-Fi Water Leak Freeze Detector Wi-Fi water leak detector sends alerts by text and email. Also has an audible alarm. Geofencing technology can tell who's nearest, and sends an all clear when the problem has been resolved. Does not need a separate hub or base station. A 5 Ft. extension sensor sold separately senses temperature and humidity. Monitoring home humidity levels can assist in alerting homeowner of potential mold formation in the home. Install water leak detection systems on major appliances such as refrigerators, washing machines or hot water heaters to monitor leaks. Detector is reusable. Cold-Alert detection. Easy to install. Notification Audible Alarm, Phone, Battery Type 3 AA, Pkg Qty 1, Package Type Box