Theres only a very thin piece of copper connecting the earphones together and after a year or so, one of the channels will go out and youll have to buy another pair. However, there is no way I could use them if I am moving, let alone exercising (they always fall, especially if I am sweating). As of today i am totally a Keen convert thanks to these shoes! I like the color and size but do not buy if you don?t have extra strong finger strength. It also is too thick (I should have expected this part) to wirelessly charge, a feature I appreciate a LOT. Otherwise I hope my review can be of help. le ciabatte si presentano complessivamente molto comode. So you start drilling expecting to drill a nice straight hole and end up hitting an angled piece you cant see and your hole is all screwy. 2 degrees is simply too small a range of movement to use with this wooden desk I have. The quality is good, they held up well to wearing all day and the straps were on TIGHT to make up for the excessive length and they didn?t budge.