Lenovo X4 Thinkplus Bone Conduction Headphone Instruction Manual
Lenovo X4 Thinkplus Bone Conduction Headphone LIST OF ITEMS Product specification Product material: ABS BT version: V5.3 Working frequency band: ISM band (2.402-2.480GHZ) Battery capacity: 150mAh Rated input: 51 110mA Charging time: 2hours Playing time: about 7…