A portable, as a usb - nitrogen, which is constructed with a usb - interface device for reproducing an instruction film, comprising:– Identification means (14) for the automatic identification of the signals of a user, the instructions for the operation of a media - player (19), and for the provision of the identified signals, in each case as a data, wherein the identifying means (14) comprise a voice recognition software, the voice commands of a user and to the speech commands and data in each case provides,– a control unit (15), which interprets the data of, in each case and, on the basis of the interpretation has taken place in each case a control command for the media - player (19) or a device, which - the media player (19) controls, generates,– a mass storage unit (16), on which at least one instruction film is stored,– a first, as infrared - interface designed air interface (13), to which the control (15) in each case can transmit the control command generated, wherein the control command via the first air interface (13) to the media - player (19) or a device, which controls the media - player, is transmitted, and..
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