Some watches have screw down crown due to its water resistant feature. Please unscrew
the crown first before using the stop watch buttons. Please remember to
screw back the crown after using the stop watch.
Do not press the buttons on the watch while the watch is submerged in water or still wet.
When using the watch in water (For watches with 200m water resistant):
Before using the watch in water, be sure the crown is screwed in completely. Do not operate the crown when the watch is wet, in water or while washing your hands.