Uni-T 600A True RMS Digital Clamp Meter 216C 600A AC and DC current measurement, True RMS response for ACV and ACA. Inrush current function for AC current measurement, V.F.C function for measuring signal at variable frequency. Non-contact voltage detection with LED indication. 3 AAA Batteries Are Needed. Batteries Included. Flashlight for working at dark environment Other functions include Capacitance, Frequency and Temperature measurements