The True RMS Clamp-On Meter Model 405 is safety rated at 1000V CAT IV. AC DC clamp meter - it measures AC, DC, and AC+DC volts, amps and power. The Model 405 also measures resistance, frequency, True InRush®, temperature, phase rotation, and continuity. It can also perform diode checks. This rugged meter can operate in the most demanding work environments, and its IP54 rating allows it to withstand both dust and water spray.