Features and specifications:
1) Plug-and-play MP3 player
2) Music format: MP3 or WMA
3) 1pc AAA battery, can play more than 6 ~ 12 hours
4) Storage capacity: 32MB~2GB bytes
5) Outputs power: 5mW
6) Two earphones: 5mW
7) Supported OS: Windows 98/Me/2000/XP/Mac OS 9.X/Linux 2.4

Size and weight
Height: 1.07 inches
Width: 1.62 inches
Depth: 0.41 inch (including clip)
Weight: 0.55 ounce