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 appsSmall and light design with firm bike attachmentCompatible with iPhone 4S and later, and with selected Android devices including Samsung Galaxy S3 and S4 using Android 4.3 or later.
