[業界最長約40時間*1連続再生を実現

20GBハードディスク内蔵のネットワークウォークマン『NW-HD5』発売](http://www.sony.jp/CorporateCruise/Press/200504/05-0406/)

sony push out the new music player.

after supporting mp3 format of NW-HD3,the newer support also.but it plays longer by the improve of battery.