Homeowners, residents, and landlords understand the toll that water damage can create when not caught early. Out of the box, the mydlink Whole Home Smart Wi-Fi Water Leak Sensor Starter Kit (DCH-S1621KT) can monitor two areas and features an AC powered Master Smart Wi-Fi Water Leak Sensor (DCH-S162) as well as a Battery-powered Remote Water Sensing Pod (DCH-S163), triggering a siren, strobe light, and mobile alert when either device detects water. Additional remote water sensing pods (DCH-S163) can easily be added to the system for whole-home water leak monitoring for up to 16 areas in the home. Sensor Features Provides a quick and easy way to monitor and help protect your home and valuables from the damage caused by water leaks Built-in 100 dB siren and strobing LED light and is perfect for alerting you to a leak when you're home Link it to your Google Home account and your Google speakers will announce when a leak is detected The kit comes with two Water Sensor so you can monitor two areas of your home out of the box Expandable for whole-home water leak monitoring for up to 16 areas in the home (up to 8,000 sq. ft.) Connects to your existing Wi-Fi router, no hub required, and uses built-in Bluetooth™ for faster setup What’s in the box Master Plug-in Smart Wi-Fi Water Leak Sensor (DCH-S162) Battery-powered Remote Water Sensing Pod (DCH-S163) RJ11 Sensing Cable Quick Installation Guide Cable Clips DCH-S163 pre-installed with 2 AAA batteries