The USB Knob is a versatile device that combines the functionality of a rotary encoder with the convenience of a USB interface. It is based on the CH32X033 microcontroller and is equipped with addressable LEDs, commonly known as NeoPixels. The unique combination of these components makes the USB Knob an ideal choice for a wide range of applications, including volume control for PCs.

One of the standout features of the USB Knob is that it requires no driver installation, making it incredibly easy to use. The device acts as a USB human interface device (HID), meaning that it can be recognized and utilized by most computers without the need for additional software.