Capacity: 20/30/40 GB Interface: USB2.0, Extra Fast USB 1.1 Compatible PC & MAC. Optional FireWire Cable Video Playback: MPEG1, 2 and 4SP with MP3 (ADPCM) Stereo Sound Resolution Up To 640x368/25f/s Music Playback: Stereo MP3 Decoding/30~320 Kbits/s.. CBR/VBR/WMA Music Recording: Stereo MP3 Encoding/30~160 Kbits/s. WAV File Photo Viewer: JPEG (Rotate, Slideshow, Zoom) Display: 3.6" Color LCD (QVGA) 960xRBx240 or TV AV Connection: Digital Line In/Out. Composite Video/Earphone/Line Out Jack Built In Microphone Playback Autonomy: Up To 10hour Without Turn On Screen, And 4hours With Screen Power Source: InternalRechargeable Li-ion Batteries External AC Charger/Adaptor System Requirements: Over Than Pentium 266MHz Windows 98SE, ME, 2000, XP, MAC Compatible Equalizer: Jazz, Rock, Pop, Classic, Normal Selectable