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.
StrapsCo Perforated Rubber Strap for Polar M400 / M430
Polar M400
Polar M400 GPS Activity Tracker Watch Black
StrapsCo Rubber Protective Case for Polar M400/M430
Polar M400 User Manual
Polar M400: GPS Watch Review
M400 GPS Sports Watch –
Polar M400 Activity Trackers
QGHXO Band for Polar M400/M430, Soft Adjustable Silicone Replacement Wrist Watch Band for Polar M400/M430 Watch (Black) : Cell Phones & Accessories
Polar M400 GPS & Activity Tracker Watch In-Depth Review
Polar M400 review: A feature-packed GPS running watch that can also track your steps and sleep - CNET
New Super Watch, Polar M400, Rocks My Fitness World - PfitBlog
Polar M400 Review, Detailed, Discount Links
User manual Polar M400 HR (English - 96 pages)
Polar M430 M400 Smart Watch, M430 Polar Watch Strap Soft