USB Volume Control Computer Speaker Audio Volume Controller Adjuster with One Key Mute Function This USB volume adjuster can directly control the computer operating system volume. It is a great volume control tool for watching videos, playing games, even will be the best volume controller for wedding, meeting, celebration and so on.  Features: Strong Construction Made of metal shell and with rotary shaft, equipped with breathing light and coming with USB cable. Wide Range of Volume The volume can be adjusted from 1 db to 100 db up to your choice, without any sound attenuation. Long Life Span  Rotary shaft supports 360°infinite rotation, more durable and great for long-time usage. Simple Operation No need to install any driver or software on your computer to drive this volume regulator, it will work once you plugging on the device.When rotating or pressing the volume knob, the breathing light under it will light on. One Key Mute Function With one key mute function, when you are listening to music, just press the knob, it will stop at once and back to music when you press again.  Specification: Comatibility: for Windows XP/7/8/10/, for Mac/Linux/Vista/Android Material of the shell: Aluminum  Cable Length: 2m / 6.56ft  Item Size: 6.2 * 4.8 * 3.9cm / 2.44 * 1.89 * 1.54in Item Weight: 107g / 3.77oz Package Size: 11.7 * 9 * 4cm / 4.61 * 3.54 * 1.57in (L * W * H) Package Weight: 153g / 5.4oz Package list: 1 * USB Volume Control 1 * USB Cable 1 * User Manual(English)