1 display type:dual color lcd 2 memories:128mb,256mb,512mb,1g,2g,4g choices. 3 music file:mp3,acc,wma,upgradeable for future music formats; pc and mac compatible 4 lyric reading:yes 5 a-b reading:yes 6 outlook:pink,beige,ivory,sliver and fancy colors for choice. 7 timber:jazz,normal,classic,popular,bass and five more equalizer. 8 total harmonic distortion:¡ü0.05% 9 earphones:hi-fi 10 radio:automatic fm,76-96mhz/87-108mhz,20 stations preset. 11 power source:inlaid lithium battery 12 bus writing speed:400 kb/sec multiple play mode:normal,repeat one,repeat all. 13 record times:ultra-fine 8~30 hrs choices. 14 weights:28g dimension:40x32x15mm 15 others:one of smallest and most economical mp3 players in the world. and the players could be clipped on the collars of the users.