just be sure it works with your phone. they tell you how to check if it will work. I have a android LG destiny and it wont work with that but works with my home computer and pluggable digital viewer on my HP computer.... warning its a cheap piece but it works well enough for my needs
this is the one I got it has the smallest head I could find at 5.5mm it almost fits in my AR
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1