U1401B数字万用表的详细介绍U1401B数字万用表：DualdisplaywithbrightLCDbacklightSimultaneoussignalsourceandmeasureforall-in-one-toolconvenienceSourcebipolarvoltageandcurrent,square-w***esignal,withautoSCANandRAMPoutputmodesMeasureDC,AC,AC+DC,Resistance,temperature,frequency,pulsewidth,dutycycle;checkdiodeandcontinuity3-yearwarrantyforgreaterassuranceofqualityandreliability4-20mAand0-20mApercentagescalereadout50,000counttrue-RMSDMMBuilt-inbatterychargingcapability)