Hi, I registered here because Xiaomi does not have any representative for English speakers to answer my issue, which is a shame by itself. (Didn't Hugo Barra go to Xiaomi?) So I wanted to warn you guys from buying these Xiaomi Pistons. I bought these earphones, and as soon as I opened them I noticed a very strong smell coming from them. The smell is really bad, it caused me quite a headache and nausea after I tried to figure out the source of the smell and sniffed a bit too hard. I think this smell is dangerous , seriously. Ofcourse, there is not any official person from Xiaomi to answer what causes this horrible smell. Just think twice before purchasing them, really. Have a good day.