Stechro’s WD76 leak detectors are built for a single, uncomplicated job: making noise when they get wet. In a category crowded with smart sensors and subscription fees, this 5-pack offers a straightforward, local alert system. You get a loud, physical alarm right where the water is, with no app or hub required.

The adjustable siren is the key feature. You can set it from a gentle chirp to a piercing 120dB blast—useful for placing one under a sink while avoiding an ear-shattering alarm in a bedroom closet. The capacitive sensors react to moisture, not just pooled water, so they’ll sound off from a slow drip on a pipe. Each unit is IP66 rated, so it can handle a splash or the humid environment of a basement utility room. Setup is simple: pop in the included AAA batteries, place the sensor where water might first appear, and forget it.

Just know what you’re buying. These are standalone alarms. They won’t send a phone notification if you’re on vacation. That’s the trade-off for their simplicity and value. For critical spots where you want an immediate, audible alert that anyone in the house can hear, this pack delivers reliable, no-fuss coverage.