At its core, this software is an EEPROM (Electrically Erasable Programmable Read-Only Memory) reader and writer. It connects to the car through a standard KKL (K-Line) USB interface cable. Unlike modern diagnostic tools that focus on reading trouble codes, this programmer accesses the raw hexadecimal data stored on the vehicle’s chips.

Users can back up their instrument cluster or ECU data. This is vital before performing any modifications, as it allows you to restore the vehicle to its original state if something goes wrong.

You must use a "VAG-COM 409.1" KKL cable, usually featuring the FTDI FT232 chip.