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GET STARTED
To make sure you get to enjoy your M400 at its best, please go to flow.polar.com/start where simple instruc-
tions will guide you through setting up your M400, downloading the latest firmware and taking the Flow web
service into use.
If you’re in a hurry for your first run with M400, you can do a quick set up by entering the basic settings on the
device, as instructed in Basic Settings.
CHARGE THE BATTERY
After unboxing your M400, the first thing you need to do is charge the battery. Let your M400 fully charge
before taking it into use for the first time.
The M400 has an internal, rechargeable battery. Use the USB cable included in the product set to charge it via
the USB port on your computer. You can also charge the battery via a wall outlet. When charging via a wall out-
let use a USB power adapter (not included in the product set). If you use an AC adapter, make sure that the
adapter is marked with "output 5Vdc" and that it provides a minimum of 500mA. Only use an adequately
safety approved AC adapter (marked with "LPS", "Limited Power Supply" or "UL listed").
1. Lift the rubber cover off the USB port. Plug the micro USB connector into the USB port in the M400,
and plug the other end of the cable into your PC.
2. Charging appears on the display.
3. When M400 is fully charged, Charging completed is displayed.
Don't leave the battery fully discharged for a long period of time or keep it fully charged all the time, because it
might affect the battery life time. Keep the USB port cover closed when not in use.
Do not charge the battery when the M400 is wet.
Do not charge the battery in temperatures under -10 °C or over +50 °C.
BATTERY OPERATING TIME
The battery operating time is up to 8 hours with GPS and heart rate sensor. When used only in time mode with
daily activity monitoring, the operating time is approximately 30 days. The operating time depends on many
factors, such as the temperature of the environment in which you use your M400, the features you use, and
battery aging. The operating time is significantly reduced in temperatures well below freezing. Wearing the
M400 under your overcoat helps to keep it warmer and to increase the operating time.