Feature: 1. Made of metal shell and with rotary shaft, equipped with breathing light and coming with USB cable. 2. The volume can be adjusted from 1 db to 100 db up to your choice, without any sound attenuation. 3. Rotary shaft supports 360°infinite rotation, more durable and great for long-time usage. 4. When rotating or pressing the volume knob, the breathing light under it will light on. 5. 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. 6. 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. 7. 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: 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 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 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 Package List: 1 * USB Volume Control 1 * USB Cable