The listing, Apple Nike + iPod Sport Kit has ended.
New in opened box.
My wife uses one with her iPhone too.
Transform your iPod nano into a personal workout coach with the Nike + iPod Sport Kit. This wireless sensor and receiver combination works exclusively with your Nike + shoes and iPod nano to give you real-time feedback during workouts and let you track your performance on your Mac or PC.
Insert the wireless sensor inside the custom, built-in pocket beneath the insole of your Nike+ shoe, then plug the receiver into the Dock connector on your iPod nano. Run. Now start your workout. As your run or walk, the sensor sends information to your iPod nano, tracking your time, distance, pace, and calories burned. If you choose, real-time, spoken feedback can even alert you to milestones throughout your workout. Sync. Back at your computer, sync your iPod nano to transfer your workout data to iTunes and nikeplus.com. There, you can evaluate your performance history, set goals, and even challenge other runners to a virtual race. Accessorize. Complete your experience with specially designed Nike apparel, including an iPod nano armband that makes it easy to stay tuned to your music during an active workout. Nike also offers jackets, tops, and shorts with waterproof pockets to hold your iPod nano.