This water leak detector is a smart device that can detect water leaks in your home and alert you in real-time. It is compatible with both WiFi and Bluetooth connectivity and can be controlled through a smartphone app. The price drops from $54.99 to $43.99 to $29.99  when you clip the $25 coupon on the product page. Shipping is free for prime members or on orders over $35. Otherwise, it adds 6.99.

Clip the $25 coupon on the product page.