... frequency: 400Hz, 1kHz 400Hz-1kHzManual adjusting: 20Hz-4kHz 20Hz-4kHzSweep range: 50Hz-3999Hz 50Hz-3999HzFrequency precision +/-1HzTest current 100mA, 50mA, 10mA ... precision +/-5%Impedance test range0.1Ω-20kΩPrecision+/-0.5% reading +/-1digitComparator PASS, FAIL, sound alarm when qualified PASS, ... ,1KHz fixed freq,20Hz-4Khz manual adjusting, 50Hz-3999Hz sweep range