Take your active lifestyle to new heights with Osso Bone-Conduction Bluetooth Headphones from OPN Sound™. They are the ideal blend of cutting-edge technology and unbeatable comfort. Osso rests outside your ears and utilizes bone-conduction technology to send sound waves via tiny vibrations through your cheekbones to your inner ear. With nothing inside your ear, Osso allows you to comfortably hear your music and calls, while staying tuned into your environment.