This water leak detector features high-sensitivity probes that detect moisture as small as 0.015 inches. It connects to Wi-Fi and sends real-time alerts to your phone via an app. It has an IP66 waterproof design and operates for up to two years on two AAA batteries. The price drops from $26.99 to just $22.99 when you clip the $4 off coupon on the product page. Shipping is free for prime members or on orders over $35.

Clip the $4 off coupon.