... 3) V, A, W, VA, VAR, KWh, PF, Hz measurement 4) Double display two parameters on eash menu and store 28 groups ... ; Max. reading: 6000 3) Range selection: Fully automatic range selection 4) Frequency detection: automatic (when harmonic is serious, it is better ... ) Data holding: “HOLD” is shown on LCD 7) Power supply: 4 batteries of 1.5 V, AA 8) Power consumption: 250 ...