Best sound sports mp3 earphone 1.portable MP3 player 2.USB cable for charge 3.more kinds of color. Best sound sports mp3 earphone Appearance 1:wire drawing process, beautiful and elegant 2:Somatological design, only 34g, comfortable and convenient 3:Elegant blue LED indicator, show your own style 4:Portable,magnet connection design 5:High-elastic,soft around beam Operating 1:3D wheel rolling ...