... .OEM 2,High quality,reasonable price,hot sale frequency panel meter,analog multimeter,dc current meterThe scope of applicationThe series ... parameter,such as AC,DC,Voltage,power synchronous volume,frequency,expended voltage and overload current etc.The product performance ... 50°C;Relative humidity:≤85%;Resistance to pressure:when self-frequency constant value various is ±15%,The error of indicationg ...