If you already own the D-Link SW-A11KT water leak sensor kit, this SW-A2 add-on pod is how you expand your coverage to more spots around the house.

Each pod wirelessly links to the main unit and lets you monitor up to 17 different locations total – think under the kitchen sink, behind the washing machine, near the water heater, in the basement, or even by the fridge or aquarium.

These little guys are battery-powered with two AAA cells that last up to 2 years, so no wiring or outlets required.

The low-profile design (just over 2 inches square) tucks away easily, and the water-sensing probes along the bottom detect even a tiny drip.

It uses long-range Sub-GHz wireless to stay connected to the master sensor from up to 1000 feet away, so it works even in tricky spots where Wi-Fi might struggle.

When a leak is detected, you get an alert through the app, giving you a heads-up before a small drip turns into a pricey repair.

New for 2025 – this version is not compatible with the older DCH-S1621KT kit, so make sure you're using it with the SW-A11KT system.

A cheap add-on that gives you serious peace of mind, especially if you've got areas in your home that aren't monitored yet.