Haozee WiFi Smart Water Valve and Automatic Shutoff,Water Consumption Monitoring and LCD Screen Display of Water Flow Rate,Built in Rechargable Battery, for DN20 3/4-Inch Diameter Pipe. Wifi function and APP remote control: Wifi smart Water valve can connect to 2.4Ghz and 5Ghz Wifi, without gateway, you can quickly open/close the water valve on the app, and the mobile phone monitors, the water flow rate and water consumption in real time. Even on vacation or at work, you can monitor in real time. Ultrasonic flow detection: Adopts W-type ultrasonic water flow measurement technology, which is accurate and reliable. Users can set water flow rate alarms, and automatically open and close, the water valve when the water flow rate is lower or higher than the set value. For example, if a water, pipe bursts, the water valve can automatically close, thereby saving water and protecting your home water safety. Smart Water Meter:Monitor water usage with daily, monthly and last usage statistics, helping you manage water more efficiently and reduce waste. Easy installation: Requires 5V/2A AC power adapter for power supply, and equipped with long-life backup battery to avoid power outages and inability to control the water valve. Built-in 2600mAh capacity NiMH battery, rechargeable, can manually open/close the valve even in power outages. Note: In battery mode, you cannot use APP for control or monitoring. Automated scenes for use with water leak detectors: Through the Tuya app, users can set up scenes to work with the Tuya WiFi Water leak detector(sold seperately), such as automatically shut off a valve when a water leak is detected. Power:DC 5V2A Backup battery:AA(1.2V) x 3pcs Built in NI-MH battery with 2600mAh capacity,rechargeable battery Valve Open/close time:12seconds Copper Tube Diameter:DN20 Screen:LCD Water Flow r