... frequency: 400Hz, 1kHz 400Hz-1kHzManual adjusting: 20Hz-4kHz 20Hz-4kHzSweep range: 50Hz-3999Hz 50Hz-3999HzFrequency precision +/-1HzTest current 100mA, 50mA, 10mA ... , 1mA, 0.1mACurrent precision +/-5%Impedance test range0.1Ω-20kΩPrecision+/-0.5% reading +/-1digitComparator PASS, FAIL, sound ...