Designed to rest in front of the wearer's ears, these headphones conduct sound through the cheekbones and into the ear canal, leaving the wearer's ears open. This permits the listener to hear more than one source of audio at a time. Listen to directions from your GPS while you navigate across streets and through public spaces easily when you wear these headphones which will never obstruct your hearing. Wired headphones require charging, Bluetooth model. Enjoy true wireless freedom with these bone-conduction headphones. They're so comfortable you may might just forget you have them on.