Pendant size, 128MB of internal storage (up to 4 hours of music)Plays MP3 and WMA music filesID3 tag displayUSB drive - store or transfer any file type5 preset equalizer modesUSB 2.0 support for fast file transfersBuilt-in rechargeable batteryIncludes: Stereo earphones with integrated neck strap, USB cable, Carrying pouch and Software Model: MP100128