Polar Stride Sensor Bluetooth

The Polar Stride Sensor Bluetooth is a nifty little pod ideal for serious runners seeking to improve their overall fitness level and running technique. It securely attaches to your shoe laces in low profile fashion and records running speed, cadence, and stride length. In conjunction with Polar's Beat app, the Stride Sensor provides running stats in real time to your iPhone's display. The Polar Beat app provides a running index by crunching heart rate info you'll need a separate heart rate sensor alongside Stride Sensor data for a personalized analysis of your running performance. Please note, the Stride Sensor is only compatible with the iPhone 4S or newer.