Neptune is a waterproof MP3 player that provides excellent sound quality underwater – without needing ear buds. The Bone Conduction technology transmits crystal-clear audio through the cheekbone directly into the inner ear. With 4 GB of storage and a charging cable that allows for quick song upload to the device, this three-piece set also offers two side speakers and a high contrast OLED display that rests comfortably on the back of the head.