Many people enjoy listening to their favorite songs while they’re working out, running or cycling, but it’s definitely much more difficult for swimmers to do the same for obvious reasons. That’s where the FINIS Duo Underwater MP3 player comes in – a tough little gadget that doesn’t rely on headphones for audio playback.
Instead, it vibrates against the wearer’s skull in order to deliver bone-conduction audio, which is incredibly crisp and clear. The device can be clipped onto the wearer’s goggles, and it is able to ensure up to 60 hours of music listening underwater. In order to upload files onto its 4GB memory, all you need to do is plug it in to your computer via an USB cable. The gadget is waterproof up to 10 feet, which should be enough for most swimmers.