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