Resideo’s RWD14 is a straightforward, no-frills defense against water damage. It’s a simple, economical set-and-forget alarm for the places you rarely check. You get four individual spot detectors, each a self-contained unit with its own sensor and a built-in, non-replaceable battery.

At 85 decibels, the alarm is a sharp, unmistakable shriek designed to cut through household noise. The touch control is just a button to test the alarm and battery. You place these directly on the floor in potential trouble spots: behind the washing machine, under the kitchen sink, or by the water heater. When water bridges the two contact sensors on the bottom, the unit sounds off.

The batteries are rated to last for years, but when they die, the entire unit is disposable. This makes the RWD14 a pure, simple tool. It won’t send alerts to your phone or integrate with a smart home. For critical but out-of-sight areas where you just need a loud, local alarm, it delivers exactly that.