... of 3-phase 3-wire, 3-phase 4-wire, single-phase mode 3) V, A, W, VA, VAR, KWh, PF, Hz ... power value and five power parameters of each phase in 3-phase measurement mode respectively 6) Autorange and TRMS ... long time 9) Large LCD display, multifunctional button controlSpecifications:1) Max. common-mode voltage: 600V AC RMS2) Mode ... voltage, current: 45 Hz ~ 65 Hz Three Phase Digital Power Clamp Meter