Reading Time and Date
Press button S1 once will display time, press button S1 once more will display date.
Set watch
1) Press button S1(right top button),it will display time and press button S2(right bottom button) following, LED will be flashing and it Indicates that the watch enter the setup mode, you can press button S1(right top button) to adjust hour and minute.
2) After time is set, pressing button S2(right bottom button), you can adjust date, year, and 12/24 hour mode successively.
Function button s3(left top button) and s4(left bottom button)
In any mode, press the button S3(left top button) or s4(left bottom button) , it could be reset directly to the time display state, and you can press this button to display the time in off the light mode.

Power
Insert one CR2032 battery to power the device.
Change the battery when the power luminosity is too weak.