STRONG CONSTRUCTION --- Made of metal shell and rotary shaft, equipped with breathing light and come with 1.5m USB cable, PU non-slip pads to keep your volume controller in place. 2.6*2" (6.5x5cm) mini size. | WIDE COMPATIBILITY --- This volume control knob compatible with Win10/8/7/Vista/XP/Mac,etc, plug and play. | SIMPLE OPERATION --- Turning the knob to turn up and down volume, press the knob to make it mute, press down the knob and turning to adjust volume more quickly; keep pressing the knob for 8s, it will enter night mode, breathing light will stay on. | EASY TO USE --- One-click mute function, direct volume adjustment without loss of sound quality. No extra power required, USB plug and play.There is no need to install any driver or software on your computer to drive this volume regulator, it will work after connecting on the device. | MULTI OCCASION USE --- A great volume control tool for watching videos, playing games, even will be the best volume controller for various activities, wedding, celebration, meeting, performing and etc.