Wonderful use experience: turn the multimedia knob to adjust the volume. With one-key mute function, when you listen to music, just press the knob, the music will stop, if you press the knob again to start playing.Rugged and Durable: The USB volume control knob is made of high-quality metal housing with a sturdy rotating shaft and a detachable USB cable, which makes this audio adjuster durable.No Drivers: This volume control knob supports Windows xp/7/8/10/ OS, once you plug it into your computer, it will start working. Plug and play, no driver required, you can directly adjust the volume by turning the knob.Delicate and Convenient: Easy to carry and use due to its mini delicate design. Combined with aluminum alloy and black exterior, the whole USB volume control knob looks more atmospheric and stylish.Material:Metalcolour:BlackPackage Contents:1 x USB volume controller 1 x USB power cord 1 x English manualOnly the above package content, other products are not included.Note: Light 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.