I thought that it mentioned that this headset had a switch for changing between mono and stereo...I was wrong. Otherwise the head phones are good if you don't like sticking things in your ears or your ears sweat when you where the old foam ones. These sound clear to me(but take in account that I am deaf in one ear), just make sure you use them in a quite area (ie. Library, cafe, bedroom)or atleast places that you want to hear beyond just the music (ie. the park, the beach, while napping).
All I can say is I have had 4 pair, three of which came from Amazon.com. They are the best headphones I have had, and I have had plenty. I will continue to buy Colby/cv110 headphones until I can't find no more.