The Klein Tools CL600 True-RMS AC Digital Clamp Meter, 1000V AC/DC, Auto-Ranging is an auto-ranging True-Root-Mean-Squared (TRMS) digital clamp meter that measures AC current via the clamp, measures AC/DC voltage, resistance, continuity, and tests diodes via test leads. This model offers a drop protection up to 6.6 ft., as well as a CAT IV 600V, CAT III 1000V, Class 2, Double insulation safety rating.