F6 Bluetooth Headset Mini Invisible Ear Business Digital Display Earphone(Black)

1. Bluetooth version: 5.22. Battery capacity: 120mAh3. Frequency: 40Hz-20KHz4. Transmission distance: about 10 meters5. Use time: about 68 hours for talking, about 30 hours for listening to songs6. Charging time: about 1 hour7. Impedance is: 32 ohms8. Sensitivity: 85dB9. Waterproof grade: IPX 510. Charging interface: Micro USB11. Weight: about 5 gramsFeatures:1. Intelligent digital display battery2. Effectively suppress noise and make calls clear3. Can connect two mobile phones at the same time4. One-key control, universal for left and right5. USB charging, portable and universal, safe, stable and fast6. IPX5 waterproof, prevent the intrusion of rain and sweat7. Fast and stable connection, high performance, low power consumption