Most, if not all, swimming headphones play music through streaming audio files from a built-in music player. Some also offer the option of streaming over Bluetooth, which is mainly present to make the headphones more useful when you’re back on dry land. You have to store files on the headphones themselves, because Bluetooth and water don’t really mix. The frequency on which Bluetooth operates is absorbed by water, which in turn impacts signal strength. If you’ve ever attempted to stream music with…
