Firstly:fits perfectly! Then you can go there and start the finding process by watching your phone and using a "hot or cold" type method. Auch hochwertige InEars wie den UE TF 900 oder Westone W4 hatte ich. Il a bien pris en compte ma carte mémoire et si le jumelage avec mon casque Plantronics a été plus laborieux, ce n?était pas la faute de son Bluetooth. Comfortable for first couple of minutes, then starting feeling the squeeze. Not bad. Fits and feels right. the mid and high are very good, perfect imaging and soundstage and very tight bass. My rave review is completely backed up from the experience of opening the box, the process of fitting the seat on my bike and then hitting the trails, works a treat! It?s a good design but unless you are working on a very light kids bike, this is pretty useless.