USB Computer Volume Adjuster Multimedia Audio Line Controller Speaker Knob Switch

1. USB plug and play, no driver required, compatible with Windows, Android, Mac/IOS system
2. No mouse, quickly adjust the volume without affecting the current work window
3. All-in-one design, fixed USB cable, prevent falling off, easy to use
4. Aluminum alloy metal shell, matte anti-fingerprint, non-slip rotary button
5. 360-degree arbitrary rotation to adjust the volume, easy to use
6. 4 soft cushions at the bottom, stable and non-slip when using it
7. Functions: volume adjustment, mute, up and down, pause
8. Size: about 2.4 x 1inch