The innovative GROHE Sense water detector alerts you the moment unwanted water leaks appear with pulsating red light and buzzer, in addition to an alert that is sent to your smartphone via the Ondus™ app. This early warning allows you to take immediate action before a simple leak becomes a flood. The Ondus™ app also provides daily updates on changes in temperature and humidity to help prevent frost damage and the spread of mold. Perfect in the kitchen, bathroom, laundry room, or anywhere a water leak could pose a potential problem. GROHE Sense uses 3 AAA batteries and connects to your home WiFi network.