Cons: Extension line is than long, and constantly broken. I bought this two times when it for sale, but the extension line is broken and broken... I just used for two months... Technically, BA100 is not well designed earphone. TDK think about this again.
Cons: If you're into the music with any kind of bass such as rock, hiphop and like to feel the rich boomy bass, this is not the one for you. For pricetag such as this, no way. I gave mine to my wife because she like the looks and did not care about the lack of bass. But it should sound better