... quality and favorable price JYS-2SY Export Type Multi-Function Power InstrumentSize : TypeJY-9S4JY-9S4-YInput,measurement,displayNetwork3 ... classFrequancy40-60HZ,accuacy class 0.2HZPowerActive,reactive apparent power,0.5% classDisplayLEDLCDEnergy calculatepositive,negative measure,0. ... `-10~60°CStorage condition`-20~70°CSafetyPressureAuxilliary power,input signal,output signal .between is above ...