DDZ193-Z and DDZ193-D single-phase intelligent energy meters are manufactured by our company using advanced large-scale integrated circuits, low-power design, and SMT technology. The product complies with the standard GB/T 17215.321-2021 "Special Requirements for Electrical Measuring Equipment (AC) Part 21: Static Active Energy Meters (Class A, B, C, D, and E)" and also meets the relevant requirements of the "Technical Specification for Single phase Smart Energy Meters of China Southern Power Grid Co., Ltd. This product is suitable for measuring residential electricity consumption.