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M400 GPS with Heart Rate Monitor

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Leave your limits in the dust.

Think of the Polar M400 GPS with Heart Rate Monitor as a training partner that constantly pushes you to perform while you're running and pushing hard in the gym. This GPS-based fitness watch maximizes every run by recording cadence, speed, and running distance. The included Polar H7 Heart Rate Monitor wirelessly feeds heart rate specifics to the watch, so you can optimize your training regimen for upcoming races and personalized goals.

For runners wondering where they stand for upcoming events, the M400 offers predictive finish times based on your long-term running progress. Individualized targets help you reach your exercise goals by setting specific thresholds for daily activity and exercise on Polar's Flow application. Activity tracking counts your daily steps, calories burned, and sleep schedule for optimized health tailored to your specific needs. As a tech-savvy bonus, Smart Notifications relay important phone messages as you exercise, all without requiring you to painstakingly dig out your smartphone from your pack or pocket.


  • GPS fitness watch for heart-pumping workouts and runs
  • Distance and cadence metrics push your running ability
  • Finds optimal heart rate as you train for upcoming races
  • Activity tracking pushes you to walk longer and get more sleep
  • Keeps tabs on phone notifications as you train
  • Waterproof design protects against passing storms during trail runs
  • Item #POL1608
Strap Material
yes, tracks steps
yes, GPS-based distance
yes, GPS-based altitude
Heart Rate Monitor
yes, bundled with Polar H7 heart rate sensor
Technical Features
Advanced GPS: measures pace, distance, and altitude, Activity tracking: tracks steps, activity, sleep, and calories 24/7, Heart Rate training with included Polar H7 sensor, Running Cadence, Predictive event finish times for 5k, 10k, half-marathon, and marathon, Polar Flow app: plan, sync, and share training data, Smart notifications: recieve text and incoming call notifications from phone, Individual Training Targets
yes, Bluetooth Smart
Operating System
Mac OSX 10.6 and later, Windows XP, 7, 8, 10
Dual Times
yes, 12/24 hour time
Date Indicator
Weekday Indicator
yes, waterproof
Battery Type
rechargeable 190mAh lithium polymer battery
Battery Life
[training w/GPS and Bluetooth] 8 hours
Polar H7 Heart Rate Monitor, 1 Micro USB cable
Claimed Weight
56.6 g
Recommended Use
fitness, running
Manufacturer Warranty
2 years