Feathers
Portable back-hang design. Convenient for sports
Can be distorted arbitrarily
Battarry : 150mAH rechargeable Li-on battery with 3.7v voltage. 
Play time: 5 hours;
Support MP3, WMA， MemoryUp to 4GB
Key-press Volume+/- Play/Pause/Previous/Next
16 Level volume control,LED indication light
Speaker Power2*10Mw
Dimension size: 130(L)*140(W) *50(L)m m 
                    
 
Accessories:packing box,usb cable.