The QCY T15 Crossky GTR True Wireless Bluetooth Earbuds are equipped with the latest Bluetooth technology (version 5.3). Annoying cable clutter is replaced by perfect performance and excellent open stereo sound, both indoors and outdoors. Enjoy up to 6 hours of music, or even up to 24 hours with the charging case. The built-in noise-cancelling microphone also allows for crystal-clear phone calls. With the practical, rotatable ear hooks, these in-ear headphones are suitable for all types of training. Whether at the gym, in the office, or at home, enjoy your music anywhere. The latest chip technology ensures deep bass, clear highs, and the best sound quality. The stylish and practical charging case not only stores the earbuds but also charges them, no matter where you are.