1.portable mp3 player R5001 2.14 hours playback life time by earphone,4.5 hours by speaker(medium volume),2 hours by speaker ma Portable mp3 player R50011.Dimension:52*37811.20mm.2.USB 2.0 high speed connection. 3.Multiple language pack.4.Audio format:MP3,WMA,WAV. 5. E-Book function. 6.FM radio.8.8GB build-in flash max supported.7. 1.1" screen 128*64. 8.8GB build-in flash max supported. portable ...