Polar M400 review: A feature-packed GPS running watch that can also track your steps and sleep - CNET
Polar M400 Sports Watch (Blue) 90057183 B&H Photo Video
How to do a hard reset on POLAR M430? - HardReset.info
Polar - Hey Polar M400 iOS users! Smart notifications have arrived! Keep up-to-date wherever you want, with notifications about incoming calls and messages sent straight to your wrist! How to activate smart
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