Features: 1. The second generation, Bluetooth 5.0 chip 2. LED Smart Light Button 3. 9D HIFI bass stereo surround 4. Graphene film speaker 5. Complete metal casing 6. Magnetic charging box 7. Ergonomics design 8. Impervious to life; whether it is sweating in the gym or performing outdoor sports in the rain, it will not cause any damage to the headphones. 9. Support simple/binaural use (left and right earphones have built-in microphones for independent voice calls) 10. Ergonomic earphones with soft natural silicone earmuffs, even if you wear the earphones for a long time will not cause ear pain and other adverse conditions.