Best Buy: Polar M400 GPS Watch with Heart Rate Black 90051339

Polar M400 review: A feature-packed GPS running watch that can also track your steps and sleep - CNET

Polar M400 GPS Smart Sports Watch with Heart Rate Monitor (Pink) : Sports & Outdoors

Polar M400 GPS Smart Sports Watch with Heart Rate Monitor (Pink) : Sports & Outdoors

Polar M400 GPS Smart Sports Watch, Black - 90051339 + 7-in-1 Fitness Kit

Polar M400 Review: Fitness/Sleep Tracker Watch With GPS

Polar M400 Review: Fitness/Sleep Tracker Watch With GPS

Polar M400 Review Tested by GearLab

Polar M400 Review - , Running tips

Polar M400 - with heart rate sensor - GPS watch

Polar M400 - With heart rate sensor - GPS watch - cycle, running