The build quality is great has 4pcs coverage sheet of rubber on the bottom, and is metal all around including the knob,and removable USB Nylon woven cable of 6.6FT. This volume control knob supports Win11/10/8/7/Mac, once you insert it to your computer, it will begin to work. Plug and play, no driver required. USB Playback 3.5mm Audio Output,Support 64GB USB disk. Song formats: MP3. Press and hold the MODE button for 2s to play the next song file in the USB disk folder. You can adjust the volume at three different speeds to reduce rotation, and there are three different colored lights.RED lights- Volume change by 4?BLUE lights - Volume change by 8? GREEN lights- Volume change by 12. When you listen to music, simply press the knob to pause the music, press it again to play the music, as well as the Next, Back, and Volume buttons to adjust the volume from 0% to 100%. CP90 can control the volume of the computer and the control functions of music applications (Spotify, MusicBee, foobar2000, VLC, iTunes, Apple music).A great volume control tool for watching videos, playing games, even will be the best volume controller for activities, wedding, meeting, celebration and so on.