![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
![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/e30a762c23e356287abeecb843d958f2fffe3036/hub/2014/11/18/97390ec4-0385-495c-bcf4-4496555bb14c/polar-m400-product-photos-09.jpg?auto=webp&width=1200)
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 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
![BoxWave Cable Compatible with Polar M400 (Cable DirectSync Cable, Durable Charge and Sync Cable for Polar M400 BoxWave Cable Compatible with Polar M400 (Cable DirectSync Cable, Durable Charge and Sync Cable for Polar M400](https://m.media-amazon.com/images/I/419sqK-UP8L._AC_UF894,1000_QL80_DpWeblab_.jpg)
BoxWave Cable Compatible with Polar M400 (Cable DirectSync Cable, Durable Charge and Sync Cable for Polar M400
![Dual-Port Rapid M400 USB Car Charger - Rapid charging, high-current M400 car charger for two devices. (Polycarbonate Charger) – BoxWave Dual-Port Rapid M400 USB Car Charger - Rapid charging, high-current M400 car charger for two devices. (Polycarbonate Charger) – BoxWave](https://shop.boxwave.com/cdn/shop/products/dual_micro_hccc_3-1_tilt_lg_2bfa6bb5-9ab6-4c30-8eac-97f8f1a6211b_1024x1024.jpeg?v=1571712320)
Dual-Port Rapid M400 USB Car Charger - Rapid charging, high-current M400 car charger for two devices. (Polycarbonate Charger) – BoxWave
![BoxWave Cable Compatible with Polar M400 (Cable DirectSync Cable, Durable Charge and Sync Cable for Polar M400 BoxWave Cable Compatible with Polar M400 (Cable DirectSync Cable, Durable Charge and Sync Cable for Polar M400](https://m.media-amazon.com/images/I/41YuaGeY63L._SR600%2C315_PIWhiteStrip%2CBottomLeft%2C0%2C35_PIStarRatingTHREEANDHALF%2CBottomLeft%2C360%2C-6_SR600%2C315_ZA50%2C445%2C290%2C400%2C400%2CAmazonEmberBold%2C12%2C4%2C0%2C0%2C5_SCLZZZZZZZ_FMpng_BG255%2C255%2C255.jpg)
BoxWave Cable Compatible with Polar M400 (Cable DirectSync Cable, Durable Charge and Sync Cable for Polar M400
![Dual-Port Rapid M400 USB Car Charger - Rapid charging, high-current M400 car charger for two devices. (Polycarbonate Charger) – BoxWave Dual-Port Rapid M400 USB Car Charger - Rapid charging, high-current M400 car charger for two devices. (Polycarbonate Charger) – BoxWave](https://shop.boxwave.com/cdn/shop/products/dual_micro_hccc_3-1_vert2_lg_7ef213a1-cddb-42aa-baa0-1cec200cc3ec_1024x1024.jpeg?v=1571712320)