How about iphone 3G need the receiver? How does it work? Where the power come from?

Nike + iPod Sport Kit

Nike + iPod Sport Kit

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1 Answer from the Community

  • Answer

    Well, the receiver is built into the 3G and 3GS. All you need is a sensor, which you can buy separately. As far as how it works, the Nike+ receiver gets the radio signal from the sensor in the shoe (or pouch) and computes the mileage, pace, time and calories. The sensor has a little battery in it.