Double Clamp Digital Phase Voltammeter, direct measurement of AC voltage and AC current in the measured circuit which not open-loop, measure the phase between two voltages, two current and voltage current, and indirectly measure the power factor and power of the circuit. 1. Model No.: ETCR4000 2. Voltage Range：0~500V； 3. Current Range ：0~20A； 4. Phase Range ：0~360°； 5. CT Size：Φ8mm; 6. Power Supply : DC9V LR61.5V AAX6PCS

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)