Polar S3+ Stride Sensor™

S3+ stride sensor comes in black with a new, firm shoe attachment which guarantees accurate speed and distance measurement. This small and lightweight sensor measures each stride you take, helping you analyze the effectiveness and efficiency of your run.

Measures running speed/pace and distance

Helps improve running technique by telling your running cadence and stride length

Determines your Running Index, which tells you about your running performance

Shock and water resistant, handling even the most demanding runs

Compatible with RC3 GPS, RCX3, RCX5 ja RS800CX.