M400 is an exceptional blend of sporty design, integrated GPS and advanced training features. It takes the best of wearable activity trackers, integrates full GPS and advanced training features and provides you with meaningful data that helps you make improvements in your lifestyle and training program. Lightweight and compact, M400 is designed to be worn all day. With its high-contrast and high-resolution display, M400 is the perfect companion for outdoor use, at any time of day. Its 24/7 activity features help you reach your daily goal and motivate you to keep moving throughout the day. Measures your pace, distance and altitude with integrated GPS. Incorporates loads of traditional and unique Smart Coaching training features to help improve your performance: automatic laps, interval timer, finish time estimator, Sport Profiles (adjustable), personal best tracking, running index (develops your running performance). Connects to Polar Flow mobile app and web service where you can sync, share and plan your workouts. Polar Flow Relive feature replays video highlights of your workout journeys and enables you to share with friends. Compatible with the H7 Bluetooth Smart heart rate sensor (sold separately, not included). Water resistant. Rechargeable battery. Battery life: up to 9 hours training time (when both GPS and HR in use), 24 days in time mode with daily activity monitoring.

Product Features

  • GPS WATCH: Built-in GPS technology keeps track of your pace, distance and altitude
  • FITNESS TRACKER: Tracks your workouts, steps, distance, calories burned, sleep quality, and activity 24/9
  • WATERPROOF FITNESS TRAINER: Use the fitness tracking watch to keep an eye on your running cadence to improve your running efficiency and avoid injuries in all weather conditions
  • ADVANCED TECHNOLOGY: Compatible with H7 Heart Rate sensor to train at the right intensity with target heart rate zones
  • SOCIAL SMARTWATCH: Plan, sync and share your training using the Polar Flow app and web service


  1. I had a bad experience. Like most of you reading this, I’m a runner, and a good, dependable watch is a really important part of the sport. After doing a bit of research, it looked like this watch would be a great way to enhance my workouts. 

  2. LOVE THIS WATCH!! – Here are my favorite features I love this watch! This is my 4th Polar product as I’ve continued to upgrade over the years. Can’t remember the model of my first HR watch, but my 2nd was an FT60, then I bought the Loop. But after doing a half-marathon with the Loop, I realized I really needed and missed the watch face with my mileage, time, average, pace, etc. I was excited when the M400 was released so I bought it a little over a year ago. Polar’s warranty is for 2 years, just so you know. You can read all of the main…

  3. this is polars mid range super productive watch. a little expensive but SOOO worth it. this device is a great upgrade to my last polar that lasted 10 years. 


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