Earond&reg; Open Ear Wireless Headphones/&nbsp;Bone Conduction Wireless Sports Bluetooth Stereo Headphones Bone conduction technology uses vibrations to transmit sound waves directly to the cochlea, Listen to the music without blocking your ears. Adjustable headband for tight and comfortable wearing. Sweat resistant, Safer to enjoy music during exercise/driving Hear without blocking your ears/communication with surroundings. ?Protect your hearing during long hours of gaming or phone conversation. It can connect two phones simultaneously, more convenient and won't lose every call.Support most ios and android mobile phones with Bluetooth.