The sensor Polar running Bluetooth® Smart is ideal for runners who want to improve their technique and performance. You'll be able to see the information about speed and distance on your training device, whether you're running on tape as the path more muddy.
Compatible with dozens of the top apps for fitness, such as Polar Beat
Measures each stride you take to show your speed and distance during the race
Help to improve your running technique by showing your cadence and stride length
Shows you how to change your race performance with the unique Running Index Polar