1.Premium Aluminum Build: Achieve precise audio management with our sleek USB volume control knob encased in superior aluminum alloy. Its matte finish resists fingerprints, while the one-click rotary button provides a tactile and alternative to traditional ABS controllers. 2.Convenient USB Plug and Play: Navigate your sound seamlessly with our PC computer speaker audio volume controller. Its 360-degree arc button is designed for comfort, enabling effortless audio adjustments without the discomfort of sharp edges. 3.Stable Anti-Slip Base: Maintain control and stability with our audio controller's non-slip base. The soft-pad ensures your device stays in place, offering peace of mind and consistent operation. 4.Lossless Sound Quality: Directly manipulate your soundscape with our multimedia controller. It guarantees the purest sound, free from degradation, for an unblemished auditory journey. 5.Generous USB Cable & Wide Compatibility: Our external audio adjust knob comes with a lengthy 1.87-meter USB cable, ensuring convenience across various setups, and offers expansive compatibility with most modern operating systems, delivering versatility for a multitude of devices. Installation method: USB driver-free Mode: button to switch dual mode Applicable to: for Windows, for OS Note:If your device can use a USB mouse and keyboard, you can also use our USB volume controls. Colour:Black Material:ABS+aluminum alloy Package Contents: 1 x USB rotary button Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.