Polar M400
Polar M400
Top 50%917 points
Top 50%
Top specs and features

Polar M400: 34 facts and highlights

1. weight

57g
Polar RCX3 GPS: 33g

2. 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
35% have it

3. thickness

11.5mm
Motorola MOTOACTV: 9.6mm

4. battery life with GPS on

There is less chance that you will run out of battery during an adventure.
8h
Polar M200: 144h

5. resolution

128 x 128px
Casio Pro Trek Smart (WSD-F20): 320 x 300px

6. 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

7. 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
39% have it

8. 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

9. Syncs wirelessly

The device syncs all of your data wirelessly, without the need for cables.
Polar M400
33% have it

10. battery life

With a longer battery life you don’t have to worry about charging the device as often.
24 days
Casio STB-1000: 730 days

11. has GPS

GPS enables global positioning, useful in map, geo-tagging or navigation apps.
Polar M400
61% have it

12. 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

13. 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

14. Is compatible with iOS

It is compatible with a range of iOS devices such as iPhones, iPads and the iPod Touch.
Polar M400
29% have it

15. 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
38% have it

16. has a battery level indicator

An indicator shows you when the device has low battery.
Polar M400
85% have it

17. Has a display

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

18. 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
18% have it

19. 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

20. 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

21. Tracks your sleep

It can track your sleep, such as how long you sleep for and the quality.
Polar M400
7% have it

22. sweat resistant

Resistance to sweat makes it ideal for use while doing sports.
Polar M400
88% have it

23. Has a stopwatch

With a stopwatch you can time yourself.
Polar M400
78% have it

24. Tracks elevation

It can detect changes in elevation, such as when you are climbing stairs.
Polar M400
42% have it

25. Counts how many calories you have burnt

This is useful if you are on a strict training diet or if you are trying to lose weight. It can also help to boost your motivation.
Polar M400
71% have it

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