iRiver and Valencell team up to produce ON, Bluetooth heart-rate monitoring earphones
 

iRiver has snagged Valencell's PeformTek bio-sensing technology for its freshly-announced ON active earbuds. Plug them into your head and the built-in hardware can relay vital statistics like your heart rate and fitness level to your smartphone. The company won't be pinned to a price or a release date, as it's still working on the companion app necessary for the gear to run, but expects to have it ready by March. If you'd like to know a little more, you can always peruse the PR, presented on the posterior of this post.

http://www.engadget.com/2013/01/08/iriver-valencell-on/