SYB Air Tubes Headset requires a 3.5mm audio jack connection to connect with a phone (or any device). If your iPhone has a built-in 3.5mm audio jack connection, you can surely use the SYB Air Tubes Headset.
However, we do not recommend using an adapter to connect SYB Air Tubes Headset with iPhone if your version of the iPhone does not have a 3.5mm audio jack connection compatibility.
If you have any additional questions, reach out to our customer service team at hello@shieldyourbody.com.