1.Plug-and-play MP3 player 2.Music Format MP3 or WMA 3.1pcs AAA battery,can play more than 8-12 hours 4.Storage capacity: 32MB-1GB bytes 5.Outputs Power: 5mW 6.Support OS:Windows 98/Me/2000/XP/Mac OS 9.X/Linux 2.4.X 7.Color:Black,Red,Blue,Silver,White 8.SIZE(HxWxD):78*31*22.5mm 9.Weight:34g