Features Split type: easy to install, the transformer is separated from the instrument, and the transformer can be installed according to the actual position of the measurement. Two-wire system: no need to connect the power supply, the red and black wires measure the voltage to the meter power supply at the same time (no need to divide the polarity). Current testing does not require additional purchase of a transformer. The instrument is equipped with a high-precision transformer. In the meter head, the l-set trimmer potentiometer can self-calibrate the voltage and current errors. 100% brand new product, all refund if unsatisfied If you have any questions. Features: -Split type: easy to install, the transformer is separated from the instrument, and the transformer can be installed according to the actual position of the measurement. -Two-wire system: no need to connect the power supply, the red and black wires measure the voltage to the meter power supply at the same time (no need to divide the polarity). -Current testing does not require additional purchase of a transformer. The instrument is equipped with a high-precision transformer. -In the meter head, the l-set trimmer potentiometer can self-calibrate the voltage and current errors. -100% brand new product, all refund if unsatisfied If you have any questions. Specification: The range of voltage measurementAC100V-300VThe range of current measurement10A(0.00~9.99A)Display modeDouble 0.39 bright LED digital tubeDisplay color( Optional )Red + red/ red + blue/ blue + blueMeasurement accuracy1% ± 2 digitsDisplay0.39 inches LED digital tube displayMeasurement speed about 2 times per secondDimensions70 * 40 * 30 mmInstallation dimensions68 * 38 mmPower supply line, measuring line lengthabout 150mm"split" transformer lead lengthabout 100mmWorking temperature -10 ~ + 50 ℃Working humidity10 ~ 80% (without condensation)Working pressure80 ~ 106 kPaSunshineNo direct exposure Package List: 1 * Current voltmeter head1 * mutual inductance coil 1 * Adapter Package List