Measures voltage, current, resistance and frequency. Tests continuity and diodes. Backlit LCD with 6,000 count display. Two voltage detection modes - non-contact or using a single test lead. 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 / RS-232 interface DMSC-2U for direct-to-PC logging. Lifetime Limited Warranty. Accessories included: (2)1.5V AAA batteries, bead temperature probe (DM-210A, DM-510A only, 400°F/204°C max), test leads, protective boot. True RMS for no-compromise accuracy. Crest capture (peak hold) plus recording of max, min, max-min and average. Low impedance Auto check mode - automatically selects AC or DC volts, resistance or continuity, Low impedance masks ghost voltage pickup. Measures capacitance. Measures temperature using a type K thermocouple.