Hehe, mine was sent by someone else. I studied it myself and worked out an approximate time adjustment. If you hold down the SET button below the clock, you will see that the screen is adjusted to 24 hours or 12 hours. This is the category of adjusting the display time, that is, the 12 hour system and the 24-hour system can be adjusted. If you want to adjust, press the up or down key, and then press SET directly to see the clock interface, and you can reset HH: MM (the two Arabic numerals here are examples). When you see HH flashing, you can adjust the hour by pressing up or down, and then press SET again. When you see MM flashing, you can adjust the minutes and seconds. If you can't adjust, you can click Settings again.