The mydlink Whole Home Smart Wi-Fi Water Leak Sensor Kit provides a quick and easy way to help protect your home and valuables from the damage caused by water leaks. The kit comes with both an AC powered Master Smart Wi-Fi Water Leak Sensor (DCH-S162) as well as two (2) Battery-powered Remote Water Sensing Pods (DCH-S163), allowing you to monitor three areas in your home out of the box. It's a simple D.I.Y. solution that doesn't require any plumbing... just simply connect it to your Wi-Fi network and place the sensors where you want to monitor for water leaks.