KLEIN TOOLS MM420 600V TRMS Auto-Ranging Digital Multimeter.

BRAND NEW KLEIN TOOLS MM420 600V TRMS Auto-Ranging Digital Multimeter. Klein Tools MM420 Multimeter is an auto-ranging, true root mean square (TRMS) multimeter that measures AC/DC voltage, AC/DC current, and resistance. It can also measure temperature, capacitance, frequency, duty-cycle, and test diodes and continuity. Klein Tools' Test and Measurement product line was exclusively designed from the ground up by electricians for electricians.