... 1.OEM 2,High quality,reasonable price,hot sale square type current meter 61*61mm,electronic ammeter,dc ammeterThe scope of applicationThe ... ,DC,Voltage,power synchronous volume,frequency,expended voltage and overload current etc.The product performance is accordance with GB7676-98standard.Main ... external connect 50mV,60mV or 75mV shunt single phase square type current meter 61*61mm