Model DDS707 single-phase electronic-type electric energy meter is made with the advanced extra-low power consumption solid integrating know-how and SMT workmanship and can be used to gauge the AC active electric energy of a rated frequency 50Hz. It features a high precision, good reliability, wide loading and powerful anti-disturbance and its performance indexes conform with the all technical requirements for the electronic-type single-phase electric energy meter in the standards of IEC1036-1996 and GB/T17215-1998.