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STORING
M400: Keep your training device in a cool and dry place. Do not keep it in a damp environment, in non-breath-
able material (a plastic bag or a sports bag) nor with conductive material (a wet towel). Do not expose the train-
ing device to direct sunlight for extended periods, such as by leaving it in a car or mounted on the bike mount.
It is recommended to store the training device partially or fully charged. The battery slowly loses its charge
when it is stored. If you are going to store the training device for several months, it is recommended to
recharge it after a few months. This will prolong the battery lifetime.
Heart rate sensor: Dry and store the heart rate sensor strap and the connector separately to maximize the
battery lifetime. Keep the heart rate sensor in a cool and dry place. To prevent snap oxidation, do not store the
heart rate sensor wet in non-breathing material, such as a sports bag. Do not expose the heart rate sensor to
direct sunlight for extended periods.
SERVICE
During the two-year guarantee/warranty period we recommend that you have service done by an authorized
Polar Service Center only. The warranty does not cover damage or consequential damage caused by service
not authorized by Polar Electro. For further information, see Limited International Polar Guarantee.
For contact information and all Polar Service Center addresses, visit www.polar.com/support and country-spe-
cific websites.
Register your Polar product at http://register.polar.fi/ to ensure we can keep improving our products and ser-
vices to better meet your needs.
The username for your Polar Account is always your email address. The same username and password are
valid for Polar product registration, Polar Flow web service and app, Polar discussion forum and newsletter
registration.