... , low price, portable hand-held, dual-channel input measuring.Easy to measure the phase between U-U, I-I and U-IIdentify ... +2)500V1V±(1.2%RD+2)Input Impedance:All the measure range is 2MΩ (2) Alternating current(see Table 2) Table ... Rate, 3 times per second3. Power Supply, Single 9V laminated cell, current of power is less than 5mA4. DimensionMeter shell, 192x95x55mmNipper ...