G-Shock GW-1800DJ-1A9 - Manual (Page 71)

E-70
Impact
• Your watch is designed to withstand impact incurred during normal daily use and
light activity such as playing catch, tennis, etc. Dropping the watch or otherwise
subjecting it to strong impact, however, can lead to malfunction.
Note that watches with shock-resistant designs (G-SHOCK, Baby-G, G-ms) can be
worn while operating a chain saw or engaging in other activities that generate strong
vibration, or while engage in strenuous sports activities (motocross, etc.).
Magnetism
• The hands of analog and combination (analog-digital) watches are moved by a
motor that uses magnetic force. When such a watch is close to a device (audio
speakers, magnetic necklace, cell phone, etc.) that emits strong magnetism, the
magnetism can cause timekeeping to slow down, speed up, or stop, resulting in the
incorrect time being displayed.