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