Q: 2012 shuffle headsets

As I think I've mentioned in your other similar topics, you can use ANY standard headphones with a 4th gen shuffle.

The 2015 iPod shuffle is essentially the same as a 2012 shuffle.  The main difference is color choice.  They are both 4th gen iPod shuffles.  They even come with the same headphones.

The 2015 iPod shuffle is essentially the same as a 2012 shuffle.  Any headphones (very large to very small) that works with a shuffle from 2015 works with a shuffle from 2012.

FYI - "Headset" does not equal "The big things that cover all your ears."  Headset usually means headphones with a built-in microphone.  iPod shuffle does not make any use of a microphone.