I started playing it at around 9. Great set, deep sound and perfect noise canceling, fits very well, very light no dropping off ears after 6 miles running. But on a dry day, they’ll work to go out on the porch with a pet, to pick up a package, or to make a short trip to get the mail. Definitely a step up from the dynamic standards. Product rating: 10/10. Hes wearing them around the house to test them out. Didnt want the burden of explaining all that with you so I kept it. I gave up and let them charge for a couple more hours, came back and my phone was able to recognize them after some more trial-and-error and rebooting. We have to pay regardless. I wear a size 8 and they fit perfectly.