1. Waterproof Sport Earphone Noise Canceling Earphone
2. Bluetooth 5.0 chip, 10m barrier-free connection
3. Ergonomic head wear, skin-friendly ear cover, long wear pain
4. 40mm large moving coil speaker, professional tuner tuning, surround sound
5. Super long service time: 20 hours of playback time, 300 hours of standby time