The Samsung FWTRUS2 Water Leak Sensor is a wireless sensor in areas of your home that are prone to water leakage (such as a basement, near a water heater, under an old pipe, or in a bathroom). You can receive an immediate alert on your smartphone at the first sign of excess moisture and prevent a minor headache from causing major damage. Excess water notifications give you an immediate alert on your smartphone at the first sign of excess water. Water detection triggers a light or siren to turn on to alert you if water is detected where it doesn't belong. Monitor your sump pump place the sensor beside the sump pump in your basement to be notified if it fails.