matic manual reading of data information, the realization of automatic meter reading unattended function. At the same time, the system also supports manual meter reading function, which can read water meter data at any time.Prepaid function:When the residual water in the water meter is less than the set value of residual water, the valve is automatically closed, prompting the user to buy water, inserting the function card and opening the valve, and can continue to use the remaining water until 0