Newly-produced 2105/B is featured with precise design, convenient operation, high performance, multi-function, a new protection holster and big LCD display. To avoid improper operation, the current jack applies mechanical protection device. Only when you select current measurement, the mA or 20A jack is open accordingly. Otherwise this jack is closed to avoid inserting the test lead wrong. “V Hz” is equipped with PTC heat sensitive element at the input terminal and this has efficient protection for the Function/Range switch. You can select different models to measure DC V, DC A, AC V, AC A, resistance, capacitance, frequency, temperature, diode, hFE and continuity. This type can be applied in engineering project, experiment test, production test, work in the open air, and electrical repairs, etc.