Also, these are not brass. I?m on my feet walking around all day at work and they are the most comfortable shoes ever! Awesome sound! I wish I could get my money back as it?s not even what is pictured. The soles started slipping about a week after I got the shoes, but theyd probably be fixed with some adhesive. I assume that they had water damage from my sweaty ear canals and that is beyond the warranty? Regardless, the packaging says that they are "splash proof," so thanks for nothing B&O. Refer my image for visualization. At least two of the four work properly with the key. I keep mine on "Confined Space" and it does well in my office, which isnt confined. Im guessing over 10 pairs and wear them all.