Open-Ear Listening: The comfortable open-ear design, made possible by bone conduction technology, leaves your ears free and offers maximum wearing comfort – on land as well as in water. Bone Conduction Technology: Thanks to the patented bone conduction technology (PremiumPitch™ 2.0), sound loss is reduced by 50%, and you enjoy outstanding sound quality. IP68 Protection: With its IP68-certified design, the Openswim can dive to a depth of 2 meters. It is completely waterproof and is your ideal training partner on land and in water. 8-Hour Battery Life: Designed to last: With a long battery life, you can enjoy a premium listening experience for up to eight hours. 4GB MP3 Memory: The integrated MP3 player can hold up to 1,200 songs, which can be easily accessed via the app.