1High Accuracy Measurement: With Hall sensor, through hole design, you can measure the forward and reverse current. without damaging the original circuit, and with calibration potentiometer, it can be adjusted by itself. 2Dual Digital Display: The meter is compact and can display real time voltage and current values on the same screen at the same time. It adopts exquisite Smt technology, dependable to use. 3Easy Operation: The current can be detected by passing the wire directly through the hole. The current of the positive and negative pole of the power supply, a certain line or equipment in the line can be measured at will. 4Resistance to Current Shock: The gauge can test the voltage or current of two completely isolated equipment, and the ammeter will not be damaged by the current impact. The withstand voltage between the ammeter and the measured conductor is up to 2KV. 5Wide Applications: The voltmeter ammeter can be used for cars, motorcycles, electric bikes and more, used to monitor storage battery, voltage and current change status or other equipment.