DDS1079 single phase two wire digital meter is designed and manufactured on the basis of stable power supply technology, and has adopted the advanced large-scale integrated circuits technology, experienced software algorithms, low power consumption design and SMT process according to the requirements of international standards. The product is characterized by integrated functions of metering, display, communication, detection, etc. It provides with functions of metering active energy and demand by time period accurately; metering voltage, current, active power, power factors, etc.