Measures heart rate from the wrist with six LED answer.
Integrated GPS with A-GPS information predicting positions of the GPS for greater accuracy. Has a built-in accelerometer for indoor activity.
Has advanced coaching features, including Polar Fitness Check, personalized Running Programme and Running Index by means of Bluetooth.
Waterproof and tracks activity and sleep 24/7. Comes with vibrating alerts and sensible notifications making it runner friendly.
Syncs information to the Polar Waft app mechanically by means of Bluetooth