QCY QY19 Bluetooth Sport Earbuds, powerful earbuds with built-in multiple functions, born to provide you with a perfect music experience. It adopts CSR8645 Bluetooth V4.1 chip to achieve apt-x losses audio decoding, thus delivering CD class tone quality. Equipped with CVC6.0 noise canceling technology, it can isolate from ambient noise granting clear calls and full music enjoyment. Based on IPX4 waterproof sweatproof function, it is suitable to be a cool and practical pair of sport earbuds. What are you waiting for? Own it, wear it and let the fun begin!