This item is the bass subwoofer only. It has a 15v dc power input (after market adapter included), 2 audio input jacks, and 2 satellite speaker outputs. It has a knob to adjust the bass, a volume knob, and a bass boost button. It's been tested and the power works and all controls work as they should, as shown in the video. I can't guarantee sound quality because I don't have the necessary components to test it fully, but it definitely works.