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Right click on the show time
Under the right according to the two-display the date
Left click on the display light and strong light time(maximum 2 -3.5hours)
Under the left key press two-show weak light and weak light time(maximum 9 hours)
Left by the three--shut off the power
Key about long press shows SOS distress signal at the same time
Right-click adjustable time date long right click right click on time flash adjustment, adjust the next, then right click to flashing adjustment and so on.
Long press the left key show flash.