This watch is an LED light watch. This watch is usually in power saving mode. It will not display the time normally. When viewing the time, just press the button on the top right to display the time. Each time it is pressed for 3 seconds, it will automatically turn off the display. Normally, pressing the lower right button has no effect. . Only used when setting the time. Time and date settings 1. Press the upper right button once to display the time 2. Then press the lower right button for 2 seconds, the time flashes, and then press the upper right button to change the hour. 3. After setting the hour, press the lower right button again, and the minute flashes. Then press the button in the upper right corner to change the minutes. 4. Set the minutes. Press the lower right button to flash, press the upper right button to change the month, 5. After setting the month, press the lower right button to flash, and then press the upper right button to change the date. After finishing all the settings, leave the button, after three seconds, it will automatically exit the time and date setting mode and save it automatically.