Water damage is one of those problems you don’t think about until you’re standing in an inch of it. Zircon’s Leak Alert WiFi Detector (2-Pack) solves that by removing every barrier to actually setting up leak detection. No hub, no wiring, no complicated pairing process. You just drop in the included CR123A batteries, connect to your home WiFi, and place the sensor wherever water shouldn’t be.

The 105-decibel onboard alarm is loud enough to hear from the basement while you’re upstairs. That matters because a slow pipe leak behind a dishwasher won’t wait for your weekly laundry room check. The app sends push notifications the moment moisture touches the sensor, so you can catch a failing water heater or a backed-up sump pump before it ruins the flooring. At 3 volts and powered by lithium batteries, these sensors run for months without needing attention.

The compact size lets you slide one behind the toilet, under the kitchen sink, or next to the washing machine without it getting in the way. The only real limitation is that these detect water already present—they won’t shut off your main valve automatically. For that, you’d need a separate smart shutoff system. But as an early warning system that actually gets installed and stays working, this two-pack covers the high-risk spots in most homes without overcomplicating things.