As a winner of "Warentest" procured, operated satisfactorily for several days. Then increasingly occurred technical problems: New audio MP3 files could no longer play, further operation is possible only limited by permanent reset. After all, it hung up completely nothing went more. It had to be returned to a reaction of the responsible trader Comtech I wait for a week. This is rather an unfortunate exception: The previous deliveries via Amazon ran smoothly.