Bone Conduction Technology Earphones adopt the advance bone conduction technology which transmit sound to your auditory center through the skull instead of air. Awareness Of Danger - Another biggest advantage of bone conduction headphones is reflected in outdoor activities . No Pain For All Day: The Open-ear design of our bone conduction earphones help you achieve the true painless and harmless. - Advanced Bluetooth 5.0 :The latest bluetooth 5.0 chip bings stronger and faster connection. Healthy and Clean: Because bone conduction earphones do not need to put earplugs in ears, it can keep the inside of the ear cclean and hygienic. - Dual listening design:Bone conducting earphones is an open, dual listening design, surround directional sound field, open design - Directional sound field speaker:Bone conduction headphones has a directional sound field around the speaker using physical ecological diaphragm technology