Best Buy: Polar M400 GPS Watch with Heart Rate Black 90051339
Polar M400 GPS Smart Sports Watch and Fitness Tracker (Black)
Polar M400 Review | PCMag
Polar - Updates for Flow app Android, M400 and V800 users: - Flow app Android release corrects the activity and training data visibility issue which some of you experienced - firmware updates
Polar M400 GPS Smart Sports Watch and Fitness Tracker (Black)
Polar M400 review: A feature-packed GPS running watch that can also track your steps and sleep - CNET
M400 displays "cancelled" at the end of charging? : r/Polarfitness
Polar - #TeamPolar, we've got a bunch of updates for you: - M400 and V800 firmware - Flow web service - Flow app iOS And the icing on the cake: Flow app
Polar M400 Review | PCMag
Polar M400 with heart rate sensor review - The Gadgeteer