This watch is a high-tech product designed and manufactured using dedicated integrated circuits, the latest microelectronics technology, and SMT process. The control chip of this meter adopts a dedicated SOC microcontroller, which has higher integration and super strong anti electromagnetic interference performance, and is specially designed for the characteristics of China's power grid. This product complies with the technical requirements of the national standard GB/T17215.321-2008 "Static Active Energy Meters (Level 1 and Level 2)".