1、 Adopt sanitary grade 304 stainless steel case, heat and low temperature resistance, anti-corrosion, anti-rust. 2、 It has the function of prepayment and valve control. 3、 It is used to measure the flow of purified water in the pipeline. 4、 Volumetric drip metering structure, anti-interference and non-magnetic pulse collecting. 5、 The data transmission adopts NB-IOT/MBUS/LORA and other Internet of things communication technologies 6、 Users can recharge through wechat on the mobile phone