Polar M400
Polar M400
Top 47%927 points
Top 47%
Top specs and features

Polar M400 review: 34 facts and highlights

1. has GPS

GPS enables global positioning, useful in map, geo-tagging or navigation apps.
Polar M400
62% have it

2. battery life with GPS on

There is less chance that you will run out of battery during an adventure.
8h
Suunto Ambit3 Peak Sapphire (HR): 50h

3. Has Bluetooth

Bluetooth is a wireless technology that allows you to easily transfer data between different devices, such as smartphones, tablets and computers.
Polar M400
36% have it

4. Provides activity reports

Your activity data is analysed to give you reports, available to view through the app or website. This allows you to see how active you have been and to help you make improvements.
Polar M400
40% have it

5. battery life

With a longer battery life, you don’t have to worry about charging the device as often.
24 days
Tech4o Traileader Jet: 730 days

6. weight

57g
Polar RCX3 GPS: 33g

7. Has a route tracker

With a route tracker you can add your route onto a map. It is helpful if you plan to do the same route again, or want to share it with your community.
Polar M400
34% have it

8. Syncs wirelessly

The device syncs all of your data wirelessly, without the need for cables.
Polar M400
34% have it

9. resolution

128 x 128px
Suunto 9: 300 x 320px

10. has an accelerometer

An accelerometer is a sensor used to measure the linear acceleration of a device. A common application is detecting when a device changes between vertical and horizontal positions.
Polar M400
39% have it

11. Has a display

The device has an electronic display to present information to the user.
Polar M400
95% have it

12. has a battery level indicator

An indicator shows you when the device has low battery.
Polar M400
86% have it

13. thickness

11.5mm
Motorola MOTOACTV: 9.6mm

14. Has trackback mode

This feature enables you to track your route and reverse it in order to guide you back to where you began your journey.
Polar M400
19% have it

15. waterproofing maximum depth

These devices will not experience water damage, e.g. in the shower. Devices which can withstand more water pressure are better for swimming or diving.
30m
Casio GWA1000FC-2A: 200m

16. Tracks distance

It tracks how far you travel.
Polar M400
76% have it

17. Has goal setting

Allows you to set your own goals, such as reaching 15,000 steps in a single day.
Polar M400
37% have it

18. Is compatible with iOS

It is compatible with a range of iOS devices such as iPhones, iPads and the iPod Touch.
Polar M400
30% have it

19. Measures pace

Measuring pace shows how much time it takes to travel one kilometer or one mile. For example, in running, a 4 minute kilometer would be a very good pace.
Polar M400
70% have it

20. Is dustproof and water resistant

Dustproof/water resistant at depth equal to or greater than 1 meter.
Polar M400
92% have it

21. Acquires GPS faster

It can periodically download data on the future position of GPS satellites. This enables it to lock on much faster, so you don’t have to wait around to get a GPS fix.
Polar M400
9% have it

22. Has inactivity alerts

The device detects when you have been idle for too long, and alerts you to encourage you to stay active.
Polar M400
19% have it

23. battery life in training mode

With a long battery life, you can train for several hours a week and only have to recharge the device every few weeks.
8h
Casio Pro Trek PRW2500T-7: 3600h

24. has a rechargeable battery

The battery can be recharged and used over again.
Polar M400
76% have it

25. Tracks elevation

It can detect changes in elevation, such as when you are climbing stairs.
Polar M400
43% have it

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