Casio GB-6900B User's Manual For Watch Functions page 64

Band
•
Tightening the band too tightly can cause you to sweat and make it difficult for air
to pass under the band, which can lead to skin irritation. Do not fasten the band
too tightly. There should be enough room between the band and your wrist so you
can insert your finger.
•
Deterioration, rust, or corrosion of the band can cause it to break, which may
result in the watch falling off your wrist and becoming lost. Be sure to take good
care of the band and keep it clean. Should you notice any breakage, discoloration,
looseness or other problem with the band, immediately contact your original retailer
or an authorized CASIO Service Center to have it checked, repaired, or replaced.
Note that you will be charged for any repair or replacement of the band.
Temperature
•
Never leave the watch on the dashboard of a car, near a heater, or in any other
location that is subject to very high temperatures. Do not leave the watch where it
will be exposed to very low temperatures, either. Temperature extremes can cause
the watch to lose or gain time, to stop, or otherwise malfunction.
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