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