Both my wife and myself are very pleased with these wireless headphones as they have solved multiple problems and issues. Ive had this microphone for a couple of weeks so far and Ive been really impressed with it. The label reads 10UK 10USA, normally the USA is one above the UK?. They stay that way even when you’ve worn them all day! 5 - 8 depending on the brand. I wish I could get my money back. I love this figure. As far as the sizing goes I will say this much. That being said I bought this about 8 or so months ago, and I would have given that one 5 stars, however it died without a clear reason. " Never heard of it.