Excellent quality: Wonderful user experience: Turn the multimedia knob to adjust the volume. It has a one-button mute function. When listening to music, just press the knob and the music will stop. Press the knob again to start playing. Sturdy and : The USB volume control knob is made of high-quality metal housing and equipped with a sturdy rotating shaft and a detachable USB cable, making this audio adjuster not only but also user-friendly. Driver-free: The volume control knob supports Win10/8/7/, and it can start working after plugging it into the computer. Plug and play, no driver required, just turn the knob to adjust the volume directly. Exquisite and convenient: Mini and exquisite design, easy to carry and use. Combined with aluminum alloy material and cool black appearance, the entire USB volume control knob looks more stylish and stylish. Anti-slip design: With a heavy metal block placed inside the base and 4 anti-slip pads attached to the bottom, this volume controller is very stable. Not easy to move. KZQV1 USB Multimedia Volume Controller PC Speaker Computer, you can use it to listen to music, watch /videos, play games, and even family gatherings, office meetings, weddings and other celebrations. USB Multimedia Volume Controller KNOB PC Speaker Computer Volume Controller USB Volume Controller How to use this multimedia knob: Mute/Unmute: Press the knob to mute the computer, press it again to unmute. Volume adjustment: Turn the USB volume knob clockwise to increase the volume, and turn the knob counterclockwise to decrease the volume. Previous song/next song: Press and hold the knob, rotate clockwise to switch to song, and rotate counterclockwise to switch to song. Colour:Black Material:Aluminum alloy Package Contents: 1 * USB computervolume controller 1 * USB Cable 1 * English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.