TRMS technology delivers precise AC/DC current measurements up to 600A, ideal for HVAC/R diagnostics and electrical troubleshooting. The high-contrast white-on-black backlit display ensures clear readings in any lighting condition. A 1-3/10 in. jaw opening accommodates large conductors while the thin profile fits into tight spaces where standard meters won't reach. Built-in voltage detector adds versatility for quick safety checks on the job.