Testbericht: Polar M400 - GPS-Pulsuhr mit Aktivitätstracker
Maintenance of your M400 | Polar USA
Amazon.com: Cable for Polar M400 (Cable by BoxWave) - DirectSync Cable, Durable Charge and Sync Cable for Polar M400 : Cell Phones & Accessories
Polar - Not only a color, but a state of mind! For those of you who fancy a little splash of color to brighten up your day. Polar M400 is now available
Silicone Colorful Replace Watch Strap For Polar M400 M430 GPS Running Smart Watch Replace Wrist Band For Polar M400 Replacement|Smart Accessories| - AliExpress