1 sports earphone; 2 neck back style design; 3 great fit comfort; 4 for mp3,mp4,pc,cd and so on; Unique Product Featuressports earphone;neck back style design;light weight and stylish design;well cushioned silicone ear pads;great wearing comfort;for MP3, CD, PC,and other multimedia player;Product SpecificationsSpeaker Diameter: 10mmSpeaker Sensitivity: 98dB +/- 5dBSpeaker Resistance: ...