True RMS for no-compromise accuracy. Measures voltage, current, resistance, capacitance and frequency. Tests continuity and diodes. Backlit LCD with dual 10000 count displays. Beep jack warns when test leads are incorrectly inserted in current measurement terminals. Automatic and manual range selection. Relative offset mode to see changes in measurements. Data hold. Use optional USB interface DMSC-9U for direct to PC logging. AC plus DC true RMS gives accurate readings on complex waveforms. Low impedance auto check mode, automatically selects AC or DC volts, resistance or continuity. Low impedance masks ghost voltage pickup. dBm function with 20 selectable reference impedance values. Crest capture (peak hold) plus recording of maximum, minimum, maximum-minimum and average. Two voltage detection modes, non-contact or using a single test lead. Two temperature measurements using type K thermocouples. Conductance measurement. Accessories included (1) 9 V battery, bead temperature probe (DM-820A, DM-830A only, 400°F maximum), test leads, protective boot, carrying case.