Arena Swimming Waterproof Earphones. The Arena waterproof earphones are designed as a replacement for the set that you get with your Arena Waterproof Player. They are also compatible with other models of waterproof MP3 player such as the Speedo Aquabeat range. Ergonomically designed for a comfortable fit; these earphones ensure you can keep going length after length. And buy this Arena Swimming Waterproof Earphones Now £20.00.