![Polar M400 review: A feature-packed GPS running watch that can also track your steps and sleep - CNET Polar M400 review: A feature-packed GPS running watch that can also track your steps and sleep - CNET](https://www.cnet.com/a/img/resize/7aa3f56d7debd4147132a43c31af53d8a0397bb8/hub/2014/11/18/616b2599-c792-4105-b6c0-f449f8c3ab5f/polar-m400-product-photos-10.jpg?auto=webp&width=1200)
Polar M400 review: A feature-packed GPS running watch that can also track your steps and sleep - CNET
![M400 Polar Strap Replacement | Polar M430 Band Replacement | M430 Polar Sports Watch - Smart Accessories - Aliexpress M400 Polar Strap Replacement | Polar M430 Band Replacement | M430 Polar Sports Watch - Smart Accessories - Aliexpress](https://ae01.alicdn.com/kf/H8cf6b9089cd24ab6ae4788fee897e364A/Hero-Iand-For-Polar-M430-Watch-Band-Strap-Soft-Silicone-Replacement-Wrist-Strap-for-Polar-M400.jpg_Q90.jpg_.webp)
M400 Polar Strap Replacement | Polar M430 Band Replacement | M430 Polar Sports Watch - Smart Accessories - Aliexpress
![Polar Watch Case 430 | Protective Shell | Protect Case | Smart Watch | Polar M400 - Smart - Aliexpress Polar Watch Case 430 | Protective Shell | Protect Case | Smart Watch | Polar M400 - Smart - Aliexpress](https://ae01.alicdn.com/kf/Hfb4bce813989499a9b607d77f2ff0c03X.jpg)
Polar Watch Case 430 | Protective Shell | Protect Case | Smart Watch | Polar M400 - Smart - Aliexpress
![Amazon.com: BoxWave Cable Compatible with Polar M400 (Cable by BoxWave) - DirectSync Cable, Durable Charge and Sync Cable for Polar M400 : Cell Phones & Accessories Amazon.com: BoxWave Cable Compatible with Polar M400 (Cable by BoxWave) - DirectSync Cable, Durable Charge and Sync Cable for Polar M400 : Cell Phones & Accessories](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/41YuaGeY63L.jpg)
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: A feature-packed GPS running watch that can also track your steps and sleep - CNET Polar M400 review: A feature-packed GPS running watch that can also track your steps and sleep - CNET](https://www.cnet.com/a/img/resize/c7c441cb6aaaaaab2c03f0c0e833b6fdf744cccf/hub/2014/11/20/2b4eef50-b6e6-4a90-a19e-755b53f16f30/polarm400.jpg?auto=webp&fit=cover&height=482&width=856)
Polar M400 review: A feature-packed GPS running watch that can also track your steps and sleep - CNET
![Tempered Glass Clear Protective Film Guard For Polar M400 M430 Smartwatch Sport Watch Toughened Full Screen Protector Cover - Smart Accessories - AliExpress Tempered Glass Clear Protective Film Guard For Polar M400 M430 Smartwatch Sport Watch Toughened Full Screen Protector Cover - Smart Accessories - AliExpress](https://ae01.alicdn.com/kf/HTB1Y2QxXsfrK1RkSmLyq6xGApXau/Tempered-Glass-Clear-Protective-Film-Guard-For-Polar-M400-M430-SmartWatch-Sport-Watch-Toughened-Full-Screen.jpg_Q90.jpg_.webp)