... diode test, continuity, dB/dBm, etc. Key Features:12 different measurement functions: DCV/ACV, DCI/ACI, Ω2W/Ω4W, frequency/period ... display (VFD)True-rms AC voltage and current measurement, with high frequency of 100kHzMaximum reading of 120,000 digitsDCV ... (RFL) mode to eliminate residual reading2W and 4W resistance measurement modes selectableBuilt-in mathematics calculation functions: mX+b, %, dB ...