Pro9 Bone Conduction Pro9 are a special kind of wireless headphones that allow the user to hear music / calls concurrently with environmental sounds. This improves the safety as well as convenience when the user is running, cycling, driving or waiting at home for visitors. Pro9 may not replace your Beats, but be able to do what Beats can’t do for you. . The earphones do not cover your ears! Always keep your ear canals open!