Clamp-On Power Meter, Basic AC Current Accuracy +/-1.50 Percent, Basic AC Voltage Accuracy +/-1.00 Percent, Basic DC Current Accuracy +/-1.50 Percent, Basic DC Voltage Accuracy +/-0.70 Percent, Batteries Included Yes, Battery Size AAA, Battery Voltage 1,000V; 100V, Calibration Frequency 20 Hz to 10 KHz, Capacitance Measurement Accuracy +/-1.90 Percent, Counts 10,000, Display Type Backlit Digital Display, Frequency Measurement Accuracy +/-0.50 Percent