The quality of these Clark’s weren’t the same as my previous experience but they were also much cheaper. Supposedly you can connect each one to a separate device but I haven’t figured that out yet. But I would say the average teenager or adult should be able to do it. These also cancel out outside sound very well too so you can listen to music without any distractions. The fit was perfect and exactly true too the size that I wear. I am a fan. I dont remember having a "break-in" period with these, which leads me to think that if there was one, it didnt last very long. Overall Im extremely pleased infact I posted this product on my facebook and decided to buy 2 more my wifes family. Wanted a short boot that I could slip into. Genuine and smells great, cant keep the ladies off me !