The USB KKL Interface driver is commonly used to enable communication between a computer and certain diagnostic tools or equipment, particularly for OBD-II (On-Board Diagnostics) interfaces. This type of interface is often used for automotive diagnostics, allowing a vehicle's onboard computer system to communicate with a computer or diagnostic software for reading error codes, monitoring system parameters, and performing other diagnostic tasks.

The KKL Interface specifically refers to a diagnostic cable that connects a vehicle's OBD-II port to a USB port on your computer. This interface typically uses a FTDI USB-to-Serial chip for communication.