In the case of the tested circuit is not open-loop, Measuring three-phase AC voltage, current, phase between voltages, phase between currents, phase, frequency, phase sequence, active power, reactive power, apparent power, and power factor and current vector sum. 1. Model No.: ETCR4320 2. Voltage Range: AC 0.00V~600V 3. Current Range: AC 0.0mA~600A 4. Frequency Range: 45.00Hz~65.00Hz 5. Data Storage : 500 groups 6. Power Supply : DC9V Alkaline battery (LR6 1.5V AA×6)