The Shokz OpenSwim earbuds allow you to listen to your favorite music underwater. Both the OpenSwim and the OpenSwim Pro have an IPX 8 value, which means that the earbuds are waterproof up to 2m deep. This allows you to use the earbuds while swimming. With OpenSwim earbuds, you can put at least 1200 songs on the earbuds from your laptop or computer. With the OpenSwim Pro, you can put up to 8000 songs on the earbuds thanks to the 32GB internal memory. You can also listen to your own music via Bluetooth on the OpenSwim Pro.