I’ve been using my running headphones with my newest phone for a while now. They are okay, but hurt my ears after a few hours. The most comfortable headphones I have are old Shure SRH440… which only have a wired connection.

I found a USB to 3.5mm audio adapter on AliExpress (apparently from BLUEKAKA):

https://a.aliexpress.com/_EvvyelY

I also needed a 3.5mm to 2.5mm audio cable, since the one from the headphones are a huge coiled affair designed to prevent kinks in the cable… great for recording in a studio but not very handy when walking the dog.

After hooking everything up it seems to work well. Yay!

Anyway, I was just carrying everything around loose until I realized that it was small enough to just strap onto the headphones. I used a hairband that my wife left lying around to attach the adapter.

It looks really janky, so I’ll probably 3D print a nicer looking setup eventually.