Wonderful use experience: Rotate the multimedia knob to adjust the volume. With a one-button mute function, you only need to the knob when listening to music, and the music stop, and the knob again to start playing. Sturdy and : The USB volume control knob is made of high-quality casing, 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 for 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 high quality material and cool black appearance, the entire USB volume control knob looks more stylish. Anti-slip Design: Heavy metal blocks are placed inside the base, and 4 anti-slip pads are attached to the bottom, this fader is very stable. Not easy to move. Material: plastic colour: Black Package Contents: 1 x Host 2 x Connection 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.