... 3.up to 20hours battery life 4.audio content is security 5.multi-language supported mp3 player,card mp3 playe,tour guide1 ... .Form of music :Mp3\wma 2.Capacity & Performance:128MB, 256MB, 1GB, 2GB, 4GB,8GB3.USB Interfaces:USB ... ME, Linux 2.4 and above, MAC OS 9.0 and higher, Windows 98/98SE(WITH DRIVER)6.Connector:USB A Type 7 ...