0, which I already have a pair but got damaged after almost two years of almost daily use with a bit of neglect. There is no hinge on mine. Sound quality is excellent. JBL with any other application I?ve ever dealt with they are products, they?ve always been pretty good. (4) It is pleasing to the eye (white, black and gray) unlike some shelving that I have seen. Dx==================================================================*Update* 4/25/2020It finally started giving me problems! The black buds are more spongy and do a great job keeping out the surrounding noise. So i snagged these for my son and they are perfect. Very nice shoes, great material, worth every penny In roxy, volcom or most sandles I will size up to 9 and have extra room but still looks fine.