Apple MA368LL/E iPod Wireless In-Shoe Sensor for Nike+ Series Shoes

The Apple MA368LL/E wireless sensor works with your iPod nano, iPod touch (2nd generation or later), iPhone 3GS, or iPhone 4 to track your workouts. Insert it into the built-in pocket beneath the insole of your Nike+ shoe and pair it with your existing Nike + iPod receiver attached to your iPod nano. iPod touch (2nd generation or later), iPhone 3GS and iPhone 4 include built-in support for Nike + iPod.

So you can get all the benefits of the Nike + iPod Sport Kit without the extra receiver. This sensor is also perfect as a replacement for a sensor that has been lost or has exhausted its battery. Or it's great if you want to have a sensor for a second pair of Nike+ shoes.