Open-Ear ListeningOur open-ear design powered by bone conduction technology ensures bud-free and comfortable listening all day, in or out of the water.Bone Conduction TechnologyEquipped with the patented PremiumPitch™2.0 bone conduction technology, OpenSwim（Formerly Xtrainerz）achieves 50% less sound leakage, and provides extraordinary underwater sound quality.IP68 WaterproofAn IP68 waterproof design withstands total submersion in up to 2 metres of water. It’s fully waterproof and submersible so you can swim, run, cycle, or train harder than ever before.8-Hour Battery LifeDesigned to go the distance. Powerful battery enables a premium audio experience for up to 8 hours.4GB of MP3 StorageBuilt-in storage allows for a library of up to 1,200 songs, ready to play at the touch of a button, enough to store all the music you enjoy.Versatile And Secure FitCompatible with swim caps, goggles and earplugs. OpenFitTM titanium design equipped with wraparound flexibility for reliable stability in any situation.Built-In MP3 Headphones*NOT BLUETOOTH COMPATIBLEIt supports MP3, WAV, WMA, AAC, and FLAC fordevice-free listening.Music Shines UnderwaterExperience underwater music like never before