ESM™ Series Digital Multimeters. 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, 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 AutoCheck™ 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. Includes Certificate of Calibration.