features:

measure active electric energy,do not need calibrate for long-term operatioon;

adopt the special chip of measurement ADE7755;

adopt the latest oversea electric energy special integration circuit;greatly improved dynamic working rang of meter; to  make the ability of actual overload up to over 10 times;

have good mistake linearity in the range of 5%ib-max;

few periphery components,simple structure,low power consumption;

adopt high reliability and long life electronic components,so the meter assume feature of high reliability and long life;