2Pcs Bone Conduction Bluetooth Handsfree Ear Hook Earphones Headset with Mic Screen Protectors Two modes can be chose:

Two modes can be chose: PWM: regulating frequency (continuous) and duty cycle

Soldier Height: Approx

2-way jog + 2 way self-locking

size from about 35mm to 42mm

Hooks and eye sets are easy to use and effective fasteners for any sewing project

2Pcs Bone Conduction Bluetooth Handsfree Ear Hook Earphones Headset with Mic Screen Protectors Two modes can be chose:ITEM NAME: 2Pcs Bone Conduction Bluetooth Handsfree Ear Hook Earphones Headset with Mic img *{margin: 0; padding: 0;. 2 Piece Bone Conduction Earphone. When exercising, the earphones are waterproof and sweat resistant. Earphone conforms to the ear, and the ear is evenly distributde, giving you a more comfortable wearing experience.