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/79fcd5094b3bf8a8174df48174f72a9d18020aee/hub/2014/11/18/616b2599-c792-4105-b6c0-f449f8c3ab5f/polar-m400-product-photos-10.jpg?auto=webp&fit=crop&height=1200&width=1200)
The feature-packed and waterproof Polar M400 offers a good set of features for beginners and advanced runners a like. It also provides feedback on your daily activities and sleep.
![](https://fellrnr.com/mediawiki/images/thumb/f/f4/Polar_M400.jpg/200px-Polar_M400.jpg)
Polar M400 Review - , Running tips
![](https://i.pcmag.com/imagery/reviews/07jyQ4j39gCV0F7nUBgJKGT-7..v1569471888.jpg)
Polar M400 Review
![](https://d1nymbkeomeoqg.cloudfront.net/photos/15/81/279576_10348_XL.jpg)
Polar M400 Review Tested by GearLab
![](https://media.dcrainmaker.com/images/2014/09/IMG_8315_thumb.jpg)
Polar M400 GPS & Activity Tracker Watch In-Depth Review
![](https://www.cnet.com/a/img/resize/2fa82cf15c5cdce749407b94c069c3ef240b9021/hub/2014/11/18/74071512-3563-4952-b7cd-7473981a7892/polar-m400-product-photos-14.jpg?auto=webp&width=1200)
Polar M400: Running and activity tracking in one (pictures) - CNET
![](https://i.ytimg.com/vi/Y31ITCG8I9w/sddefault.jpg)
Review: Polar M400 Fitness Tracker Watch
![](https://www.cnet.com/a/img/resize/0fa946cdcf353673c0f5bb90d5dc16c891939003/hub/2024/01/04/69cf4e10-5162-4a3d-84c8-c4313670da58/240104-site-one-more-thing-apple-watch-drama-v2.jpg?auto=webp&width=768)
Polar M400: An activity tracker with the heart of a GPS running watch - Video - CNET
![](https://www.cnet.com/a/img/resize/63f1b34b9084b9d41da3322e458a4863e84ae9d6/hub/2014/09/25/c21db66d-790b-49a9-a066-596751efd50a/m400beautyshotengimperial.jpg?auto=webp&fit=crop&height=360&width=640)
Polar M400 review: Polar M400, an activity tracker with the heart of a GPS running watch - CNET
![](https://media.dcrainmaker.com/images/2014/09/IMG_8342_thumb.jpg)
Polar M400 GPS & Activity Tracker Watch In-Depth Review
![](https://www.cnet.com/a/img/resize/5d14c8d6ee6f6b090f209e666f78c4980a71bfc2/hub/2014/11/18/616b2599-c792-4105-b6c0-f449f8c3ab5f/polar-m400-product-photos-10.jpg?auto=webp&fit=crop&height=900&width=1200)
Polar M400 review: A feature-packed GPS running watch that can also track your steps and sleep - CNET
![](https://images.craigslist.org/01414_2kO9EKMfgyr_0nV0CI_600x450.jpg)
Polar M400 GPS Smart Sports Watch - general for sale - by owner - craigslist
![](https://media.dcrainmaker.com/images/2014/09/IMG_6637_thumb.jpg)
Polar M400 GPS & Activity Tracker Watch In-Depth Review
![](https://i.ytimg.com/vi/YmqDZoLhb5k/maxresdefault.jpg)
Polar M400 GPS & Activity Tracker Watch In-Depth Review