There was not enough clearance between the housing of the trailer hitch and the shaft of the trailer ball mount assembly. My favorite sandals. I also love the ability to pick out individual notes and tones while listening to music, and Ill focus on them as the song progresses. My skin is very reactive and I have not had any adverse reactions or breakouts. Love it and it fits in my purse too! Cons:-The battery lifespan. Cant beat the price. Ive been trying to find replacement keys but they only do the top half part. until you?re blue in the face and look like an idiot to your coworkers, but play/ pause wont work unless you use your phone app pause/play, which is a nuisance while you?re walking. No need for crappy-sounding noise cancellation headphones!