True RMS for no-compromise accuracy. Measures voltage, current, resistance, capacitance and frequency. Tests continuity and diodes. Backlit LCD With Dual 10,000 Count Displays. BeepJack 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. Lifetime Limited Warranty. AC+DC True RMS gives accurate readings on complex waveforms. Low impedance AutoCheck 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 max, min, max-min 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)9V battery, bead temperature probe (DM-820A, DM-830A only, 400°F/204°C max), testleads, protective boot, carrying case. Includes Certificate of Calibration