unique design best selling mp3 1. support MP3, WMA 2. rechargeable Li ... time playback 4. CE, Rohs, Sisvel unique design best selling mp3 1. support MP3, WMA 2. rechargeable Li battery ... 4. CE, Rohs, Sisvel 1.unique design best selling mp32.Portable as a usb drive 3.USB 2.0 ... capacity: 128 MB - 16GB7.Operating system: no driver is needed above Windows 98 System requirements HardwarePC or notebook has usb ...