UNI-T's UT139B is a True RMS Auto Range Digital Multimeter with 4000 display count and 1kHz bandwidth, featuring VFC, NCV, Max/Min/Rel measurements.

The meter can measure AC/DC Voltage and Current, variable frequency voltage (V.F.C.), resistance, diode, circuit on-off, capacitance, frequency ratio.

Main features

1. MAX/MIN/REL modes

2. Data hold, LED backlight, auto power off

3. VFC: low pass filter

4. Full range protection (600V)

5. True RMS

6. NCV

7. Auto/manual ranges selectable