The Finis Duo is a waterproof MP3 player designed for swimmers that offers the highest quality sound without the use of ear buds.  The Duo utilizes a sleek, two-piece design and Bone Conduction audio transmission to deliver crystal clear audio through cheekbones to the inner ear.  An integrated clip design secures the Duo to goggle straps to rest on the cheekbones for a comfortable and streamlined fit.  A simplified interface offers four buttons to easily navigate between songs, podcasts, audio books and other supported audio files.  The Finis Duo supports unprotected MP3 and WMA files.  The included USB magnetic dock allows for universal data transfers and charging.  The device offers 4GB of flash memory and a Lithium-Ion rechargeable battery life of up to 7 hours.   Features:-   Bone conduction audio transmission creates amazingly clear sound in the water without the use of ear buds. -   Supports mp3 & wma audio formats -   Compatible with itunes®; listen to music, audiobooks, podcasts and more -   4gb of storage stores approximately up to 1000 songs or 60 hours of playback -   Integrated clip design secures the device to goggle straps to rest on the cheekbones for a comfortable and streamlined fit -   Rechargeable lithium-ion battery with up to 7 hours of battery life -   Waterproof ipx8 to 3 meters and 30 minutes -   Sound is clearest when submerged in water -   Gold-plated connection pins -   USB magnetic dock allows for quick uploading and charging while also preventing corrosion in the water