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 Durable: 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 durable 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- design: With a heavy metal block placed inside the base and 4 anti- pads attached to the bottom, this volume controller is very stable. Not easy to move. KZQV1 USB Multimedia Volume Controller 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 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.