![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/3311f833880d7e308321b7ad92f39552d9f68bbe/hub/2014/11/18/616b2599-c792-4105-b6c0-f449f8c3ab5f/polar-m400-product-photos-10.jpg?auto=webp&fit=crop&height=172&width=306)
Polar M400 review: A feature-packed GPS running watch that can also track your steps and sleep - CNET
![Amazon.com : QGHXO Band for Polar M400/M430, Soft Adjustable Silicone Replacement Wrist Watch Band for Polar M400/M430 Watch (Black) : Sports & Outdoors Amazon.com : QGHXO Band for Polar M400/M430, Soft Adjustable Silicone Replacement Wrist Watch Band for Polar M400/M430 Watch (Black) : Sports & Outdoors](https://m.media-amazon.com/images/I/41RRZHFGxtL._AC_SY1000_.jpg)
Amazon.com : QGHXO Band for Polar M400/M430, Soft Adjustable Silicone Replacement Wrist Watch Band for Polar M400/M430 Watch (Black) : Sports & Outdoors
![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/2b801963ea3df437c926c8204a277e93e199bc1a/hub/2014/11/18/d4058596-e577-4eda-8536-a2398b2f808e/polar-m400-product-photos-19.jpg?auto=webp&fit=crop&height=360&width=640)
Polar M400 review: A feature-packed GPS running watch that can also track your steps and sleep - CNET
Polar - Runners! Stride sensor support for Polar M400 is here. We've also improved the GPS fix! Learn more: http://bit.ly/1GJC6jr | Facebook
![Polar M400 Activity Tracker/GPS Running Watch With Heart Rate Sensor! | Gadget Explained - Reviews Gadgets Electronics Tech Polar M400 Activity Tracker/GPS Running Watch With Heart Rate Sensor! | Gadget Explained - Reviews Gadgets Electronics Tech](https://1.bp.blogspot.com/-96kJ_YcnjL4/VsiPBiWUzVI/AAAAAAAAB40/Xc32uC6eIp4/w1200-h630-p-k-no-nu/IMG_20160218_153142.jpg)
Polar M400 Activity Tracker/GPS Running Watch With Heart Rate Sensor! | Gadget Explained - Reviews Gadgets Electronics Tech
![Watch Strap For Polar M400 M430 GPS Running Smart Sports Watch Band Silicone Wristband Wrist Bracelet Belt Strap Present|Smart Accessories| - AliExpress Watch Strap For Polar M400 M430 GPS Running Smart Sports Watch Band Silicone Wristband Wrist Bracelet Belt Strap Present|Smart Accessories| - AliExpress](https://ae01.alicdn.com/kf/H255f1c5fc01d4b50aa09d410e33358ef0/Watch-Strap-For-Polar-M400-M430-GPS-Running-Smart-Sports-Watch-Band-Silicone-Wristband-Wrist-Bracelet.jpg)