Model: A130060K1. The Finis Neptune underwater features, including bone conduction technology, integrated display, increased memory, and iTunes compatibility, is frankly unlike anything weâve seen in a long time.The Neptune MP3 is comprised of three key pieces, including two hydrodynamic side speakers that sit on your cheekbones and an OLED display screen that rests on the back of your head. Whatâs with the cheekbones, you ask? Interestingly enough, in addition to vibrations through our ear drums, humans are actually able to detect sound through our bones (similar to the way marine mammals communicate). The Neptune MP3âs Bone Conduction audio transfers sound vibrations from your cheekbones to your inner ear, creating a unique listening experience â music will sound as if itâs playing in your head! Even better, the award-winning design of Neptuneâs speakers means no uncomfortable ear buds, and with your ears âfreeâ, you can still hear whatâs going on around you. Finis Neptune underwater MP3 Player will never be perfect without a Finis Universal Wall Charger Designed for use with FINIS SwiMP3 devices Ideal for travel and can be plug into all standard outlets includes USB port.