The PQ2071 is a 1-/3-Phase 1000-Amp True RMS AC Power Clamp Meter. Extech's multifunctional PQ2071 Power Clamp meter operates as a True RMS Clamp Meter, Power Meter, Multi-meter, and AC-Voltage Detector. Featuring a category IV-600-Volt safety rating, the PQ2071 measures AC Current,-Voltage, Frequency and Power including True Power, Apparent Power, Reactive Power and Active Power. Measures 1-Phase and balanced 3-Phase True Power (kW), Apparent Power (kVA), Reactive Power (kVAR) and Active Power (kWh), plus Power Factor and Phase Angle. 2.16 in. (55 mm) clamp jaw opening. Large dual backlit LCD display (9999 count) with bar graph. Frequency measurement to 200 Hz. manually store/recall up to 99 data sets. Data Hold, Max/Min, and Auto power off functions. USB interface for connection to a PC for data logging function with included software. Complete with test leads, four color-coded leads and alligator clips, USB cable, PC software, 9V battery and soft case.