A dual-channel True RMS data logger that records AC voltage (up to 600V) and AC current (up to 200A) simultaneously, storing as many as 256,000 readings at a user-set interval from one second to 24 hours. It runs on either AAA batteries or the included AC adapter and comes bundled with a current clamp, voltage leads, USB cable and PC software for downloading logs to Excel. This unit ships with a NIST-traceable calibration certificate.