The Sharp HPBC55 Black Bone Conduction Earphones deliver 6 hours of playtime with Bluetooth 5.3 and IP68 waterproof protection, making them ideal for active lifestyles. Featuring a built-in 32GB memory for MP3 playback, lightweight comfort, and call-answering functionality, they keep you connected wherever you go. With ear-free bone conduction technology, they provide private listening while reducing hearing damage, all with a quick 1.5-hour recharge.