Manual and auto laps
4 MB Flash memory
Rechargeable 190 mAh lithium polymer battery
Battery duration up to 8 hours of training time with GPS and Bluetooth Smart heart rate sensor
The M400’s built-in GPS keeps track of your pace, distance and altitude. With the “Back to start” feature you can safely explore new routes.
The M400 tracks your steps, activity, sleep and calories 24/7, encouraging you to stay active every day.
Heart rate training
Heart rate training is one of the most effective training methods. Take advantage of it by using a Polar H7 heart rate sensor.
Running cadence from the wrist
Keep an eye on your running cadence to improve your running efficiency and avoid injuries
Plan, sync and share your training using the exclusive Polar Flow online service and mobile application. All data is easily viewable.
Smart Notifications allow you to see notifications from your phone directly on the screen of your M400.
You can set your own individual training targets and follow your progress towards them using Polar Flow.