Amazon.com: BoxWave Cable Compatible with Polar M400 - Micro USB Keychain Charger, Key Ring Micro USB Cable - Jet Black : Electronics
CELLONIC® Cavo di ricambio con connettore Micro USB compatibile con Polar M400 / A370 / A360 / RC3 2A per smatwatch bracciale fitness, tracker 2m Nylon grigio : Amazon.it: Altro
Amazon.com: Weinisite Watch Band for Polar M400/Polar M430 Watch Band,Replacement Soft Silicone Band For M400/Polar M430 Sport Watch (Black) : Cell Phones & Accessories
Amazon.com: QGHXO Band for Polar M400/M430, Soft Adjustable Silicone Replacement Wrist Watch Band for Polar M400/M430 Watch (Black) : Cell Phones & Accessories
Amazon.com: Charger Compatible with Polar Unite Replacement Charging Cable Dock Cord Station USB Cradle Adapter Accessories for Polar Unite Fitness Watch : Cell Phones & Accessories
Amazon.com: RuenTech Bands Compatible for Polar M400 watch Strap Replacement Soft Silicone Wristband Sports Band Compatible with Polar M400 and M430 Smart Sports Watch-White,M(5.5''-8.0'') : Electronics