nice headphone, answer cell phone and voice dialing, all basic function as described with no problem, easy to operate ! can listen to PC music through the USB cable provided, a plus ! Haven't tested the mp3 player or home audio system yet, waiting for another bluetooth music adapter to come to test!Sound qulity is good, bass is a little stronger than listen from PC or from PC speakers directly !The design is little bit uncomfortable, the headphone basically put pressure on your ears and consider the headphone is not adjustable ! I have saw other reviews with same issue and for me it's even worse because I wear eye glasses and it make me even more uncomfortable !That's why I rate it 3 stars instead higher as I would like to ! Thanks !