... unique back-hang design, fashion; Convenient for sport, high endless MP3. 4. Unique two-in-on; Mini-USB-charging interface. 5 ... : 150mAH rechargeable Li-on battery. Play time: 5 hours. Support MP3, WMA, MemoryUp to 4GB Key-press Volume+/- Play/Pause/Previous ... , LED indication light Speaker Power2*10Mw Dimension size: 130(L)*140(W)*50(L)mm Accessories: Packing box, earphones, USB cable, charger ...