Very responsive, professional, and understanding. Janky knockoff headphones the look nothing like the pictured item. They also have a smaller set for those little ears or children. Great fit to my bike and no brainer instalation. The rail looks good when mounted and at the risk of sounding ridiculous, it was a shame to cover it up with a towel! When I got these back it was like listening to my music as if Id never heard it before. I am still hunting for a sandal which I can use for a longer time, which is light weight , give me a bit height and also comfortable . They have great sound quality and dont bother my ears. Extra star to Amazon for ease of exchange. Charges fast both wired (USB type C) and wireless with any Qi wireless charger.