Extech MA620 600A AC TRMS Clamp Multimeter with Voltage Detector includes voltage measurement capability with built in non-contact voltage detector with LED alert. Extech MA620 600A AC TRMS Clamp Multimeter with Voltage Detector is a True RMS digital clamp meter that provides multimeter functionality, including: AC Current, AC/DC Voltage, Resistance, Capacitance, Frequency, Temperature, Duty Cycle, Diode, and Continuity.