The KMC Composite USB Device is a USB driver used for devices that are part of the KMC (Kong Myung Corporation) brand, which is typically related to various USB devices such as multi-function peripherals, audio/video interfaces, or other specialized equipment. "Composite" indicates that the device may have multiple functionalities (e.g., storage, audio, or input devices) combined into one USB device interface, and the driver allows your computer to interact with these features.
KMC Composite USB Device and how to install its driver on a Windows computer: