This Sony X series Walkman 16GB can store up to 4000 song or 60hours of video. Surf the net with Wi-Fi on the 3" full colour OLED touch screen display. This Walkman will support major file types including MP3/MP4/WMA/AAC/Linear PCM/AVC/WMV/JPEG. Replay your downloads knowing that your ear bud headphones will give you a balanced rich sound quality, giving you deeper bass.