My sister and I put it together in about 20 minutes with little need for help from instructions. I purchased these because i was looking for a pair of head phones that would not fall out when i would go for a run. My first experience with B&O headphones was the wired Earset in the 90?s. A higher button is the volume down/back button. Eventually the earmuffs started deteriorating. You just pull the adhesive tab downwards, towards the floor, like you are stretching a piece of chewing gum. My ankle easily turns in them. Again, so happy I did. I bought both size 5 and 6 with her moderately narrow feet measuring a 6 ( a hair short of 13cm) according to the size chart. Wide for me, should of gotten a narrow.