It equals your videos as image quality on iPhones are very good but some where audio lacks as compare to video quality this headphones completes that. After you open the lid, apply pressure on the bottom part - like you are trying to push it back into the case. Things I already knew:- These are not bass centric- Noise cancellation does not block all sounds, but blocks most. I love KEEN shoes and have many pairs. These were cute but not comfortable. A worthwhile step up from the HD558s for me personally. la lunghezza è corretta ma sono un po strette per cui vi consiglio un numero in più se le volete indossare un poco comode. I normally have to try on anything from a 9. When you do, it will seem like nothing?s happening and you may think your unit is defective. Less than half the price of the next lowest priced option.