Wonderful use experience: Rotate the multimedia knob to adjust the volume. With a one-button mute function, you only need to press the knob when to music, and the music will stop, and press the knob again to start playing. Sturdy and Durable: The USB volume control knob is made of high-quality metal casing, 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, the volume can be directly adjusted by turning the knob. 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. Anti- Design: Heavy metal blocks are placed inside the base, and 4 anti- pads are attached to the bottom, this fader is very stable. Not easy to move. Type: Controller Size: 98x59x34mm Material: aluminum alloy Colour: Black Package Contents:1 x Controller 1 x USB Cable 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.