1. Bluetooth version: 5.1 2. Transmission distance: 10 meters 3. Frequency response range: 20Hz-20HKz 4. Speaker size: 10mm 5. Speaker impedance: 32 ohm +/-15% 6. Signal-to-noise ratio: greater than or equal to 102db 7. Microphone sensitivity: -42dB+/-3dB 8. Charging interface: Type-C 9. Life time: about 32 hours 10. Earphone full charge time: about 1.5 hours 11. Replenishment times of the charging box: about 3-4 times 12. Voice call, intelligently eliminate noise 13. It can be used with both ears and single ear. It can be connected when picked up, which is convenient to use 14. Ergonomic design, comfortable to wear
