home alarm wireless water leak protection system batteries power Brass Smart Valve DN15 DN20 DN25 and 4pcs wireless water sensor 433 version: when the wireless water sensor detects flooding (detecting the occurrence of water leakage), the water sensor immediately sends out an RF433 signal, and then the wireless smart valve receives the RF433 signals to close. Note: 1.This 433mhz version can/x27;t connect to the mobile phone, only send RF433 signals to close the valve. 2.You can add many valves and water sensors to this system as you want. 3.This system no need WlFl, no need adapter, don/x27;t support phone app. 4. The remote controller only can control the valve close or open. On the open distance, the remote controller/x27;s working distance is approximately 200-250 meters. Fully wireless system: 1.Wireless valve are powered by 3 batteries (AA), no need the wires. 2.Standby consumption is so low that one set of batteries lasts for 2-3 years. 3.The wireless water sensors are powered by batteries (23A 12V). 4. There are 3 buttons on the valve actuator (ON-Open, OFF-Close, and a button to check battery charge). 5. For correct operation of the valve, it is recommended to check the charge once a month. Specifications: 1. Valve size / pipe size: DN15 (1/2 inch), DN20 (3/4 inch), DN25 (1 inch) 2. Wireless valve power supply: 3pcs AA batteries (included) Wireless valve Power supply voltage: DC4.5V 3. Wireless water sensor Power : 1pc 23A 12V Battery (Included) 4. Operating Frequency : 433mhz 5. Receiving range of the sensor: up to 300 M. (depending on external interference) 6. Operating temperature: 0-50°C 7. Valve working pressure: 0.8MPa 8. Closing/opening time: 7-15 seconds 9. Torque: 30-45kg.cm 10. Waterproof: IP66 (water sensor), the wireless valve is not