MP3 Player Necklace with Touch Keypad 2. Automatic Power off with Earphone Disconnect, USB Patent Approval 3. Support the format of MP3/WMA and U-DISK 4. Windows compatible file system as removable drives (FAT 12, 16 and 32) 5. No display 6. Rechargeable battery 7. USB 2.0 high speed interface 8. MLC type...