The Extech EX420-NIST is a compact, 11-function autoranging digital multimeter. The EX420 measures AC/DC voltage and current, resistance, diode, continuity, and frequency, all with ±0. 3 percent basic accuracy. The EX420 can also capture Type K temperature readings. These numerous functions enable professionals to carry one meter into the field instead of several. Featuring a large, backlit LCD screen (4,000-count) with easy-to-read, 1-inch-tall digits, the EX420 provides high resolution over wide ranges, low current measuring down to 0.1 uA, as well as input fuse protection and misconnection warnings. With NIST Calibration.