what's the difference between the Nike + Sport kit and the Nike Sport Sensor by itself?

The sport sensor package by itself says "no receiver required". What's the difference between that and the sport kit that comes with the receiver?

Nike + iPod Sport Kit

Nike + iPod Sport Kit

Product No Longer Available

1 Answer from the Community

  • Answer

    the reciever will eventually run out of battery so it will need to be replaced. also, the iphone and itouch have the receiver built in