Features
 Made of metal shell and with rotary shaft, equipped with breathing light and coming with USB cable.
 The volume can be adjusted from 1 db to 100 db up to your choice, without any sound attenuation.
 Rotary shaft supports 360°infinite rotation, more durable and great for long-time usage.
 When rotating or pressing the volume knob, the breathing light under it will light on.
 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. 
 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.
 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 list
 1 * USB Volume Control
 1 * USB Cable