Easily connect to snaps of any size and much much more, VERY secure connection. These leadwires rise less than 1/4 inch off of the snap connection so once in place they allow the freedom to move into any position you desire without worry, even sitting or lying on your back. You can even wear them under clothing without being noticed.
Comes with a 2.5mm plug. 3.5mm or 4mm adapters are available if needed.