1 sports in ear earphone; 2 neck back style design; 3 great fit comfort; 4 for mp3,mp4,pc,cd and so on; Unique Product Featuressports in ear earphone;neck back ... stylish design;well cushioned silicone ear pads;great wearing comfort;housings in various kinds of color style design;for MP3, CD, PC,and other multimedia player;Product ...