Lenovo X3Pro Bone Conduction Bluetooth Sports Earphone(Black)

1. Bluetooth version: 5.32. Vibration speaker size: 16mm3. Transmission distance: more than or equal to 10m4. Play time: 7h5. Charging time: 2h6. Speaker specifications: 0.5W, 8, 86+3dB7. Charging interface: USB micro8. Rated input: 5V 100mA9. Battery capacity: 135mAh