... aa2W/aa4W, frequency/period, diode test, continuity, dB/dBm, etc. Key Features:12 different measurement functions: DCV ... 4W, frequency/period, diode test, continuity, dB/dBm, etc.High-brightness vacuum fluorescent display (VFD)True- ... frequency, period, continuity, diodeMathematic functionmX+b, %, dB, dBm, RELRangeAuto, manualDisplayVFDTrigger modeINT/MAN/BUSProgrammable delay0~6000mSReading storage & ...