More than just speed and distance, this small and lightweight durable sensor measures each stride you take, helping you analyse the effectiveness and efficiency of your run. Provides you with information on how to improve your running technique ? in competitive situations, shorter or faster strides…

…your training. Its range of personal training zones means you can train at the right intensity, and with advanced features, that come along with the s3 stride sensorTM W.I.N.D., you'll be able to track your progress with running index as well as stride length and running cadence.

Replacement battery for the Polar s3 Stride Sensor.