Description:With plug-and-play function, this volume controller can allow you to adjust the volume of the computer easily and quickly via rotating when you insert it to your power-on computer.One-key mute function enables this volume controller to enter mute status at once when you press and restore sound when you press again.Made of high-quality metal material, it is firm, impact resistant and durable to use.The length of the product is 5cm, the width is 6.5cm, and the height is 4cm.With a 2m USB cable, it is suitable for using with your desktop computer or laptop. And it is a great computer volume control knob for watching videos, playing games and so on. It is compatible for Windows 10/8/7/Vista/XP, for Mac.Item Name: Volume ControllerMaterial: MetalFeatures: One Key Mute, Plug and Play, AdjustableSize Details: 5cm x 6.5cm x 4cm/1.97" x 2.56" x 1.57" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Volume Controller1 x 2m Data Cable1 x User Manual