Features: 1. Equipped with a 3-inch woofer and 3W high power output, as well as stereo surround sound, this wired desktop speaker can bring you surging bass enjoyment. 2. The full-range speaker unit is combined with the bass diaphragm cavity space sound acoustic structure design, and the bass impact is extraordinary. 3. Equipped with a bass reversal hole to make the bass more shocking, the combination of treble and bass, and independent knob adjustment can control the sound effect you want 4. Equipped with an independent switching button, it can save power and is more convenient. There is no noisy current when shutting down, and the experience is smoother. 5. You can install this subwoofer speaker at home or in the office. It is suitable for devices such as desktops or laptops and has a wide range of compatibility. Package includes: 1 x main speaker 2 x sub speakers 1 x user manual