Speedo Aquabeat MP3 player sinks, floats, and is terrible at the butterfly stroke | Engadget
AGPTEK S07 IPX8 Waterproof MP3 Player with Clip, 8G Portable Underwater Music Player with Screen and Waterproof Headphones for Swimming, Surfing, Running and More, Blue : Amazon.ca: Electronics
Reproductor MP3 acuático Sony NW-WS413 Negro de 4 GB · El Corte Inglés