Size: Water Sensor Water leaks/floods happen and can be costly if they are not detected quickly. This wireless water leak sensor is designed to protect you and your property in case of flooding or water leakage in the home; the wireless water sensor will automatically send a signal to the control panel which will notify you via your phone in the instance a leak is detected. The Water Leak Sensor is pre-programmed and works with your SO2 or GSM Security System instantly -- right out of the box -- and you can install them and fully protect your home in 15 minutes or less. All systems are fully customizable, so you can start with the sensors listed in this package and add more of the sensors to precisely fit your needs.