HD STEREO SOUND: “Bluetooth 4.1 & Best Chip” dual technology provides CD-quality sound and stable signal, frees your sports with inspiring and wireless sound Specially designed with matal magnetic, giving you ultimate comfort and fit. Characterized by stylish design and advanced technology, you will be cool and trendy once wearing it MOLDABLE EARHOOK FOR SECURE FIT: Built for Sports, the moldable earhook can be flexibly curved to fit different people, sit firmly around your ears just like ordinary earbuds and never fall out on the move. Fit for all size ears NOISE REDUCTION TECHNOLOGY: To help you focus on sport with music, Noise cancelling reduction system actively reduces ambient noises and reserves immersive clear sound