Use it to convert your vinyl to digital. It’s a turntable-to-PC interface that lets you bypass your hi-fi amp. Just plug the turntable into the pre-amp, plug the pre-amp into your PC gameport. Input capacity and output are both three-level selectable.

Input capacity adjustable to three levels (100pF, 250pF, and 425pF)
Output level selectable in three steps (300mV, 550mV, 1100 mV)
Filter function with highly accurate RIAA equalizer curve (20 Hz - 20kHz)
Distortion factor: 0.002% (5mV)