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l When you connect your A300 to a computer, check that there is no moisture, hair, dust or dirt on the
A300's USB connector. Gently wipe off any dirt or moisture. Don't use any sharp tools for cleaning to
avoid scratching.
Operating temperatures are -10 °C to +50 °C / +14 °F to +122 °F.
HEART RATE SENSOR
Connector: Detach the connector from the strap after every use and dry the connector with a soft towel.
Clean the connector with a mild soap and water solution when needed. Never use alcohol or any abrasive
material (e.g. steel wool or cleaning chemicals).
Strap: Rinse the strap under running water after every use and hang to dry. Clean the strap gently with a mild
soap and water solution when needed. Do not use moisturizing soaps, because they can leave residue on the
strap. Do not soak, iron, dry clean or bleach the strap. Do not stretch the strap or bend the electrode areas
sharply.
Check the washing instructions on the label of the strap.
STORING
Keep your training device and heart rate sensor in a cool and dry place. Do not keep them in a damp envir-
onment, in non-breathable material (a plastic bag or a sports bag) nor with conductive material (a wet towel).
Do not expose the training device to direct sunlight for extended periods, such as by leaving it in a car or moun-
ted 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.
Dry and store the strap and the connector separately to maximize the heart rate sensor 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.