After that, I struggle to think of a single thing that worked well and reliably. Ive been through 3 sets of Beats over the past 2 years because I sweat a lot while I run. The strings should not be able to come undone, the minute my son gets ahold of them, they are untied and then pulled off. I decided to go with these and Im SO HAPPY I did! For example, the USB fob. There is a minor issue reading the manual regarding the volume adjustments. They really dont tangle which is amazing. I normally don?t like wireless earbuds because they always fall out my ear. I love the color and it is a solid built waterproofing device that I can wear in a hot tub. The instructions state there are two pins included, they are supposed to be different sizes.