Listening to sound through bones, subverting traditional listening methods, Jiankang: Reduce direct damage to eardrums from in-ear headphones; Safety: It is safer to travel with hands free. Hygiene Non-in-ear speakers can keep the ears away from bacterial nuisance. SOG-GL01: It is not only a bone conduction Bluetooth headset, but also a pair of glasses that can listen to music anytime, any where Note: The lenses of the glasses can be switched at will. Customers can go to the special eye shop to match the corresponding lenses according to the template lenses provided by our company