G-Shock MRG-8100B-1A - Manual (Page 9)

8
Caution!
Use of the Watch
To avoid unexpected accidents, always check around you to
ensure you are in a safe place before looking at the display of the
watch. Looking at the watch while running or jogging on the open
road, while riding a bicycle, or operating a motor vehicle can lead
to accidents. Take care to avoid running into others.
Take care to avoid breaking your fingernails when fastening and
unfastening the band. Particular care is required by people with
long fingernails.
To avoid unexpected injury or skin irritation due to allergic reaction,
do not wear the watch while sleeping.