Sanag A9S Bone Conduction Bluetooth 5.1 HiFi Sports Earphone (Black)

1. Bluetooth version: V5.1 2. Transmission distance: 10 meters 2. Battery capacity: 170mAh 3. Frequency response range: 20Hz-20KHz 4. Charging input: DC5V 170mA 5. Charging time: 1.5 hours 6. Impedance: 16 ohms 7. Aviation grade material, IP67 waterproof and dustproof 8. HiFi sound quality, intelligent noise reduction, 32G memory 9. 10,000 times of reciprocating test of high-strength titanium alloy for the whole machine, arbitrary bending tension 10. Net weight: 32g