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.Mini headphones, only slightly smaller for an even more comfortable fit for those with narrower faces. Navigate easily, answer the phone, listen to music, read a book, and still never miss any of the sounds in your environment with these bone-conduction headphones. All Aftershokz headphones charge via Micro USB.