The Extech MN42 is a compact, manual-ranging Digital Multimeter equipped with capabilities a tradesman or technician can use every day while also perfect for a hobbyist, hacker/maker, or DIYer working on home improvement and A/V projects. Built-in Non-contact Voltage Detector (from 100 to 600VAC). AC/DC Voltage, DC Current, Resistance, Continuity / Diode, Battery Test.