The ear is not blocked, meaning you can still hear your surroundings - making it it safer for use duing actvities such as jogging, cycling and mountain climbing. High quality sound is accomplished with no use of an amplifier and the ergonomic design means that there is no fatigue or hearing ability reduction with use.
Read on for more information and specifications
Note: Also comes in waterproof models.
This company is also responsible for technology such as a bone conduction hearing aid and adaptors for phone headsets.
Specifications for Bone Conduction Headphone