A table for multiple cards, put card water, take card to stop water supply, water (water) automatically records the user of the card. Card in the amount of water automatically shut down without water after use, the user needs to enough water to water. More water pay more, from the essential to achieving the water conservation. 
 For the hotel. Guesthouses. School. Enterprises. Kai Shuifang. Hospital. Bath. Laundry. Pure water supply and other public water measurement occasions 
 Multi-user Water Control System composition divided by multiple users and public water meter controller two. Multi-user water according to water usage charges; public water supply device type and measurement time is divided into two kinds. Timing model according to the length of time the water charges, metering type according to how much to charge for use of water