Our company's smart card prepaid water meter - remote control is the basic function implemented on the card prepaid water meter. By loading the 485 software and hardware communication module or attaching other wireless communication modules, the remote prepaid function can be achieved. It has the characteristics of small size, light weight, low power consumption, high precision, strong anti-interference ability, high integration, good reliability, and easy installation and use. It mainly provides modern management of water use for households, industries, and other industries to urban water supply departments.