Polar M400

For urban and trail runners who want sporty design with advanced GPS and training features, along with loads of options to keep an eye on their activity.

Polar M400 Review Tested by GearLab

Polar M400 Tutorial Get Started

StrapsCo Rubber Protective Case for Polar M400/M430

Polar M400/M430 protection case neon orange >> Horlogeband.com

Polar M400 HRM Watch

Polar M400: GPS Watch Review

Tempered Glass Protective Case Cover Tempered Glass Screen Protector - 3 1 M400 - Aliexpress

Updated] Why I switched from Garmin to Polar M400

Polar M400 GPS & Activity Tracker Watch In-Depth Review

Polar M400 Review

Polar M400 Activity Trackers

Polar launches M400 combined GPS watch and activity tracker + video

Polar M400 Screen Protector, M430 Polar Screen Protector