Klein Tools CL600 TRMS Digital Clamp Meter 600A AC Auto Ranging AC/DC Voltage CAT IV measures AC current up to 600A and AC/DC voltage up to 1000V using its clamp and up to 60MO resistance via test leads. The Klein Tools CL600 features an easy-to-read backlit display, auto-ranging, data freeze, automatic shut-off, audible continuity, and more. The Klein Tools CL600 can easily handle any tough work environment.