If you are looking for a professional and USB volume control knob, then your research is over here. That's because our product can meet your need. Adopted of , it is practical and durable for long time use. It is not easy to get deformed and bring you much convenience. Features -Color: Black -Material: iron, rubber, electronic components -Size: 6.00X5.00X4.20cm/2.36X1.97X1.65in - This USB volume controller supports most operating system, it can work with a good connection to the computer, plug and play, no driver required, you can directly adjust the volume by turning the knob. - One-key mute: first connect the multimedia controller, in the process of sound output, just press the knob down, the sound will be muted immediately, press the knob again to start playing music. - between previous/next song: Press the knob and not , rotate the knob at the same time to to the previous song or the next song. - Fit for playing games, watching videos, listening to the music, and etc. - Excellent craft, carefully down to every detail to give it and beautiful look. Package list: 1 x volume control knob 1 x USB cable