Tuya WiFi Smart Ultrasonic Water Valve - Automatic Leak ShutoffProtect Your Home 24 7 Even During Power Outages Most smart water valves become useless when the power goes out. The Haozee Gen 2 Ultrasonic Valve features a built in high capacity battery, ensuring your basement stays dry even during a storm. Why Ultrasonic? Unlike traditional valves with mechanical turbines that get stuck with mineral buildup, our ultrasonic sensors measure flow from outside the stream. No wear, no maintenance, just pure precision.