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New Polar M400 watch combines GPS functionality with daily activity tracker features
Polar M400: An activity tracker with the heart of a GPS running watch - Video - CNET
Polar launches M400 combined GPS watch and activity tracker + video
Polar Announces Nike+ Run Club Integration for Line of Connected Products - PezCycling News
The world's first analog watch with clinically validated ECG - ScanWatch
Polar M400 Review, Detailed, Discount Links
Apple Watch Series 2 Review: Still Not a 'Need,' Finally a 'Want' - WSJ
Polar M430 GPS HRM Watch Review - Believe in the Run
Road Trail Run: Polar M430 GPS Heart Rate Watch and Polar Flow Review: Simple, Comfortable, Accurate with a Great Free Training Platform
Stay tuned, Polars move? – Polar M430 – Appelmoessite