Yep, like NY Biker said, you have to send them the unit or the warranty is voided. That's why I have an F11 watch dead in one of my drawers for like 3 years now and also because I'm lazy!! Also Polar doesn't use the new +ANT technology, keep that in mind if you are planning to buy a HRM from them.
As for GPS's, yes, to calculate distance you will need one. If you have an iPhone or any android device you can install the RunKeeper or Wahoo apps to calculate the distance using the GPS already installed in the phone. You can select different type of workouts using these apps. I'm currently using the Wahoo HRM in conjunction with their app to jog and or bike and didn't have to spend money on a GPS.
Last edited by Maye; 05-02-2012 at 01:54 PM.
Mariela
'12 Trek Lexa SLX