... test 2.DC12V power supply 3.Multimeter,power meter funciton 4.CE, FCC, ROHS certification CCTV ... , etc.Digital MultimeterMulti-MeterVoltage, current, resistance and capacitance measuring, continuity testing, diode testing.POWERPower AdapterDC5V, 2ABattery1 pcs Lithium Ion ... , work for 12 hoursLow ConsumptionSleeping mode, display battery power stateOther ParametersWork Temperature-10°C---+50°CWork ...