The Duo™ is an 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, audiobooks and other supported audio files. The 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. Underwater MP3 player designed for swimmers that offers the highest quality sound without the use of ear buds. Bone Conduction audio transmission delivers crystal clear audio through the cheekbones to the inner ear. 4GB of storage and supports MP3 and WMA audio formats so you can listen to music, audiobooks, podcasts and more. Integrated clip secures the Duo™ to your goggle straps for a comfortable and streamlined fit. Waterproof IPX8 with a rechargeable lithium-ion battery.