1) Max. common-mode voltage: 600V AC RMS 2) Mode of display: LCD display; Max. reading: ... CAT II ,600 V CAT2) Power measurement of 3-phase 3-wire, 3-phase 4-wire, single-phase mode 3) V, A, W, VA, VAR, KWh ... is shown on LCD 7) Power supply: 4 batteries of 1.5 V, AA 8) Power consumption: 250 mW9) Storage temperature: - ... frequency for voltage, current: 45 Hz ~ 65 Hz Three Phase Digital Power Clamp Meter