Polar Cycling Cadence Sensor Bluetooth for Apple and Android

Cadence Sensor Bluetooth Smart Boost your cycling performance and find out what your most efficient pedaling rate is. The sensor works with Bluetooth Smart technology and consumes only a little energy. You can later analyze your training at the Polar Flow web service. Compatible with dozens of leading fitness apps Small and light design with firm bike attachment Compatible with Polar V800 watch Compatible with iPhone 4S and later and select Android devices using Android 4.3 or later.