... functions: DCV/ACV, DCI/ACI, aa2W/aa4W, frequency/period, diode test, continuity, dB/dBm, etc. Key Features:12 different ... functions: DCV/ACV, DCI/ACI, Ω2W/Ω4W, frequency/period, diode test, continuity, dB/dBm, etc.High-brightness vacuum fluorescent display ... , AC current,2-wire resistance, 4-wire resistance, frequency, period, continuity, diodeMathematic functionmX+b, %, dB, dBm, RELRangeAuto, ...