Mastech MS2109A True RMS Digital AC DC Clamp Meter 600A Temp NCV RC Test Tester Jaw Size : 26mm/1.0. Tests AC/DC Voltage and Current, Resistance, Capacitance, Frequency and Duty Cycle Type-K thermocouple contact temperature measurement.Built-in Non-Contact Voltage Detector Work Light and Display Back Light.Diode Check and Continuity Test MAX/MIN and Data Hold.Relative Measurement Low battery indicator.Auto power-off