In-Ear Headphones - Universal - Ear Ear Ear yyh Highlights Universal Ear Ear Ear yyh Ear Ear Ear yyh Product is shipped based on color or size of the main image of the product page. Aikswe Bluetooth 5.0 Open Ear Sports Wireless Headset Run-Ear Stereo Sound HD Handsfree for Cycling | Bluetooth earphones and headphones for the human ear to hear sound: (1) Air conduction: the sound waveThrough the external auditory c, causing tympanic membrane vibration (2) bone conduction: in addition to air conduction, bone can also transmit sound. The skull vibrates, sending sound to the inner ear, which can also be heard. A new way of Auditory-Ear-to-Ear Design Conduction Technology.Delivers Directionally.-Head-to-Head Speakers are not really Bone Conduction Headphones.Many other sellers on the platform have written this kind of bone conduction earphone for sales purpose.