Nike Ipod Sensor: If you like to walk/jog/run/bike you will love this item.
It work's along with your ipod, by tracking how many
calories you burn the distance to go and your pace in
which you do it in. You can customize your workout
distance, play list's, even if you would like a "trainer's"
voice to update you through out your work out.
I don't know how I lived with out it for so long.
And the price is VERY reasonable, you can pick up a
sensor at any major sport's store that sell's Nike for
about $30.00.
I bought mine & Matt's on Ebay for $19.99 with free
shipping. So if you have the time to search for a deal
they are out there.