UT61E Digital Multimeters ture RMS USB/RS232 duty cycle best quality,cheapest price, light weight, ... small moderate and portable UT61E Digital Multimeters ture RMS USB/RS232 duty cycleBasic Functions Range Best Accuracy DC Voltage ... %~99.9% √ Special Functions Manual Ranging √ RS232(USB) √ Diode √ Ture RMS √ Continuity Buzzer √ Data Hold √ Analogue Bar Graph 61 √ REL √ Peak ...