The Extech 382075 Clamp-on 2000A TRMS 3-Phase Power Analyzer computes, measures, and displays 3-Phase Power on Unbalanced or Balanced Loads, Displays Lag/Lead Voltage/Current phase shift in degrees, Capable of storing and recalling last 5 readings, Dual Displays: kVA & kVAR, kW & PF, Volts & Hz, Phase-Angle & Hz, or Amps & Hz, and Advanced Min/Max & Relative Functions.