This might have been a great concept in 2004. In 2014? Not so much.
A Fantastic New Concept for Wireless, Smart Sport Headphones by FX-SPORT
Only 8GB? And doesn’t do anything an app on a phone can do?
Most training apps do everything this can do already, and all you need are a pair of (preferably wireless) headphones in addition to the phone you’re probably already wearing.