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
Polar M400/M430 - Wrist Band Change - YouTube
How to install polar m400 m430 watch bands - YouTube
Wrist Band Strap for Polar M400 M430 Sports Smart Watch Soft Silicone Belt Replacement Bracelet Wristband Watchband Accessories - Price history & Review | AliExpress Seller - Satisfied Buying Store | Alitools.io
Silicone Replacement Watch Band Bracelet Strap for Polar M400 M430 Watch | eBay