Scientech 4092 Audio Distortion Meter tenders a minimum residual Distortion and Noise of 0.005%. It is best suited for measurement & testing of high quality Audio Systems. Scientech 4092 comes with a calibrated monitor output for Spectral Analysis and Visual inspection of input signal after filtering out the fundamental. Scientech 4092 has a resolution of 0.1%, Automatic frequency range selectors, and Automatic frequency nulling with 15% capture range. Scientech 4092 is a must for all Distortion related measurements.