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
Amazon.com: BoxWave Cable Compatible with Polar M400 (Cable by BoxWave) - DirectSync Cable, Durable Charge and Sync Cable for Polar M400 : Cell Phones & Accessories
Polar M400 review | TechRadar
Amazon.com: ReadyWired USB Charging Cable Cord for Polar A360, A370, M400, M450, V700 Fitness Tracker : Electronics
Amazon.com: BoxWave Cable Compatible with Polar M400 (Cable by BoxWave) - Micro USB Keychain Charger, Key Ring Micro USB Cable for Polar M400 - Jet Black : Electronics