The screw lock type button features a mechanism that can securely lock the button when it is not being operated in order to prevent any operational errors and to improve its water performance.
It is necessary to unlock the screw lock type button before operating it.
Once you have finished operating the button, make sure to relock it.
【To unlock the button】
Turn the button ring clockwise. Turning the button ring until you can see the entire check line and it stops will enable you to operate the button.
【To lock the button】
Turn the button counterclockwise until it stops.
If the screw or button get dirty, they may not operate properly. Daily care
Note that if you turn the button ring more than you need to, the screw lock button may be difficult to return to its original position.
Before you go diving, check that both buttons are properly locked.
Do not use the buttons when the watch is wet or when you are underwater.