the NUT : plug in your earbuds
Even though you can hear music and calls through the NUT, we understand that you will still want to listen to music and take calls using the Apple earbuds supplied with your iPhone.
The NUT has a weatherproof earbud bung which is made from the same rubberised material as the shock absorbing jacket. This means that when it is firmly in place it provides protection against water and dust ingress, and even when the earbuds are plugged in, it still provides a weatherproof seal.
You can still open and close the lid with the earbuds plugged in. Just be sure to remove them before removing the iPhone from the NUT!