1.Format: MP3 2.Multi EQ selective 3.Mp3 files playback 4.A-B repeat 5.Card reader 6.MMC/SD card slot 7.Seven segment display 8.AAA battery lasts 8 hours 9.No driver needed above windows 98 Accessories　 1. 1 beautiful line earphone 2. 1 USB line 3. 1 User manual and warranty card 4. 1 download disc Spec: 1. Size:89(L)*25(W)*15(H)mm 2. Weight:43g 3. USB port:USB 1.1 4. SNT:92.8dB 5. THD:-56db 6. Phone output:5mw+5mw 7. Power consumer:50mw 8. Disk read/write speed:970k bytes/sec, 546k bytes/sec