Product Description Features: super-good stereo headphones 2019 high quality Earbud headphone F8 headphone sport bluetooth earphone waterproof Specifications: 1. Chipset: Airoha AB1532Dï¼? 2. Blutooth version: Blutooth V5.0ï¼? 3. Blutooth band: 2.4GHz Class 2ï¼? 4. Bluetooth version protocol: Tensilica HiFiEP, Hardware FFT, SRC, Filter, MCSync TWS+; 5. Battery: box battery is 2200mah, earphone battery is 85mahï¼? 6. Receive sensitivity: -83db/3M; 5. Channel mode: hihg-quality stereo; 6. Blutooth distance: 10 metersï¼? 7. Waterproof rate: IPX7ï¼? 8. Microphone Sensitivity: -42 ±3dBï¼? 9. Speaker: Φ6mm/32Ω/Typï¼? 10. Distortion rate: THD