A very nice little device that a person aged mm like me can use; 4 GB, not bad for storage of music and is compatible with the small music phone card !!! short super easy: to remove the files from one window is made just drag files to another ... friendly interface live certainly not very technosupermoderne but rather easy and intuitive! more than adequate to MP3 and radio, with the original helmet! shell made of good quality and ergonomics! overlay separate small plug on house current outlet on easy USB port; fairly substantial autonomy (for night work 3 to 4 nights of music about) ... is well clipped on clothing.