Three-phase Digital Phase Voltammeter 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 between voltage and current. 1. Model No.:ETCR4300 2. Current Range: AC 0.0mA~20.0A 3. Voltage Range: AC 0.00V~600V 4. Phase Range: 0.0°~360.0° 5. Frequency Range: 45.00Hz~65.00Hz 6. Power Supply: DC9V Alkaline battery (LR6 1.5V AA×6)