Link: http://blog.testfreaks.com/review/review-of-jaybird-jf3-freedom-bluetooth-wireless-headphones/

Quote: 

“Up for review today I have a unique set of Bluetooth headphones, the Jaybird JF3 Freedom. These are made for active people and they’re actually the official headphones of the USA Triathlon Team, so that right there should tell you something about them. The JF3 Freedom headphones are meant to be used while running or working out, they’re specifically designed with an active lifestyle in mind. These headphones are sealed to keep moisture out and even come with a lifetime warranty against sweat. In my time with them I’ve come to like them as a very good sounding set of headphones for listening to audio with. They do have a built-in microphone for making and receiving calls but I think that’s a secondary function as that’s not a feature you’ll want to use often….  ”