This Sennheiser pairs with two devices at a time (refers to them as phone 1 and phone 2), so it connects directly with my BT capable Dell laptop and my iPhone. They were really easy to install and look good on the car. If I do, Ill update this review. 5mm fitting, meaning any aftermarket cable will have to be trimmed down to try and get it to fit into the hole area. This is caused by the earcup pivots, which are just round plastic pin into round plastic hole. El producto llego dañado a causa del trasnporte, pero se pudo resolver con el ensamble. I bent a number of other options on my way to this stand, this one can take serious weight. They are both similar price. I just did a test run with my students and had all of them use their headphones and just like mine, everyone said that the sound came out clear and can get really loud depending on what you have the volume up. Used BOSE earphones for a while and switching to these were no discomfort although I never owned ANC ones so couldnt compare that aspect.