Light and flexible appearance, small size, easy to install. The seal ring used on the structure under the force will never- leak,Hall elements imported, water-proof design to prevent water. for DC 3.5V-24V / Pulse characteristics ( 8xQ-4)±5%, F-frequency, Q-flow- per liter/minute. Water pressure resistance : More than 1.75MPa working voltage range DC3.5 ~ 24V. Can be perfectly used for water heaters, water dispenser, water purifier, water vending machine.