Clamp-On Power Meter AC Current Measurement Resolution 10 mA AC Voltage Measurement Resolution 0.1 mV Basic AC Current Accuracy +/-2.00 Percent Basic AC Voltage Accuracy +/-1.00 Percent Basic DC Voltage Accuracy +/-1.00 Percent Batteries Included Yes Battery Size 9V Battery Voltage 600V Calibration Frequency 60 Hz Capacitance Measurement Accuracy +/-1.50 Percent Capacitance Measurement Resolution 1 nF Counts 9 999 Crest Factor 1.42 DC Current Measurement Resolution 10 nA