Meet the H2O Audio SONAR PRO WITH PLAYLIST+: a pair of waterproof bone conduction headphones ready for swimming. Since Bluetooth range can be limited under water, you can use this set to stream music offline. The H2O audio app lets you add songs and manage all your music.
The SONAR PRO WITH PLAYLIST+ has 8GB memory built-in. SONAR can receive music from your smartwatch but it needs to be attached to your goggles to work under water. These headphones can be submerged to 12ft.