1.CE, ISO9001:2008 certificate 2.Accuracy :1.0% 3.IEC 51-1:1984 standard DM 9648--KW TYPE-A, ... ,TYPE-CDM 9648--KW3 TYPE-A,TYPE-B,TYPE-CDISPLAY: 3 1/2 DIGITS LED MAX.1999 ACCURACY: ±1% OPERATING TEMP ... ,5000/5A single phase current max. input voltage 380V,300V,220V otherwise display screen will be showen over ma.1999KW. Digital Panel Meter