Compatible Systems: Works flawlessly with operating systems including Win10/8/7/Vista/XP/Mac. Simply plug it into your computer via USB C cable, Bluetooth, or 2.4G USB connection and it's ready to enhance your multimedia experience. Simple Operation: Rotate the knob to adjust the volume, press to mute, and press while turning for quicker volume adjustment. Beyond volume control, configure the knob through software to perform additional functions like adjusting screen brightness, navigating web pages, and refreshing browsers. LED Indicator Modes: Choose from five distinct RGB lighting effects to personalize your workspace ambiance, easily adjustable through accompanying software. 3-in-1 Connectivity: Offers versatile connection options including wired (USB C), Bluetooth, and 2.4G USB, ensuring compatibility with a wide range of devices such as laptops, desktops, and computers. Wide Applications: Ideal for various settings, from personal entertainment to professional engagements like meetings and celebrations, providing a reliable and intuitive volume control solution. Specifications: Model: Multimedia Controller Knob Material: Plastic +Aluminum Alloy Color: Black Compatible Devices: Laptop, Desktop, PC, Computer Connectivity: USB C cable, Bluetooth, 2.4G USB Package Contents: 1 x USB Volumes Controller 1 x USB cable 1 x 2.4G USB 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.