BestDealUSA USB Sport Running MP3 Music Player SD Slot Handsfree Headset Headphone
Built-in rechargeable li-on battery.     Enjoy your sports and music at the same time!     S/N ratio ≥86db    USB: USB 2.0    Playtime: music playback up to 6 hours    Operating system: Windows 98/2000/XP     Output Frequency: 20Hz-20kHz     Working Temperature:-10~45Degree  Package Contents:     1 x USB Sports Mp3 Music Player SD Headphone