Using the Behringer PRO MIXER DJX900USB is easy. First, connect it to your PC or Mac via the built - in USB interface. You can start recording and playing back digital music files right away without any setup or drivers. Adjust the crossfader curve according to your mixing style. Use the 3 - band kill EQ to fine - tune the sound per channel. The intelligent dual auto - BPM counter helps you keep the beats in sync. When using the auto - talkover function, adjust the separate depth control to your liking. For maintenance, keep the mixer in a clean and dry place. Avoid exposing it to extreme temperatures or moisture. Wipe it with a soft, dry cloth regularly. If you notice any issues, stop using it immediately and consult the manufacturer.