Free ear,Avoiding ear painfull. AIR CONDUCTION TECHNOLOGY
The sound waves from the source in the air are transmitted to the middle ear through the outer ear, causing the eardrum to vibrate, and then the vibration of the eardrum is transmitted to the inner ear, stimulating the auditory nerve, and finally reaching the auditory center, and people will hear sound, this way of conducting sound is called "air conduction"Retains the integrity of sound better than bone conduction during sound transmission.Higher quality of sound.