... 3.We can provide meter ,voltmeter,ammter,power meter.... 1.CE CCC Approval 2.ISO9001 ... the printed circuit board of the header.Product parameters:Power Supply: DC: 5V, or AC: 220V, ... (user specified) Range expansion: with shunt or transformer Power consumption: ≤1.5VA Accuracy: 0.2%±3 characters ... , lightning and etc, please use the external power line filter or non-linear resistors to interfere and ...