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instructions 1. Press the button on the right once to turn on the light and display the time. Press it again to display the date; 2. When the light is on, hold your finger on the button for 3 seconds, and the hour will flash. At this time, adjust the hour. Press once to increase the hour. 3. After adjusting the hour, press the button for 3 seconds, and the minute will flash. At this time, adjust the minute. Press once to increase the minute. 4. After adjusting, wait for a few seconds and return to the time display interface. If there is no operation for 3 seconds, enter power-saving mode.