This device will allow the OEM stereo to play MP3 files from USB flash drives and memory cards, as well as add an input for connecting external audio sources, such as AUX. The audio signal directly enters the stereo through the CD changer connector, without any interference, as with FM transmitters. Control is carried out from the OEM stereo, as well as from the buttons on the steering wheel. Automatic start of playback when the ignition is turned on, playback continues from the place of the last stop.