Look Keo Power Essential Pedal - Polar Bluetooth Smart

By measuring your power output, you can truly develop your cycling performance and technique. This system uses Bluetooth® Smart technology and consumes only a little energy.
A cost-effective choice for basic power measurement, the set includes two pedals and one power transmitter.

Kéo Power Essential Bluetooth® Smart will be available in October 2014. It will be compatible with Polar V650 and V800.

• Gives instant feedback by measuring accurate power output in watts
• Displays the current and average cadence
• Shows how you use force against the pedal with the force vector feature
• Easy to set up and switch between bikes
• Compatible with iPhone 4S and later, and with selected Android devices including Samsung Galaxy S3 and S4 using Android 4.3 or later.