Press and hold the top left for about three seconds, and the watch displays TVO flashing. Press the three on the top right. Now it's BJS or BKG. Press the lower left key to turn off DST in daylight saving time. If it's 12H, press the lower left key again, and it will turn to 24H. Press the left key once to switch functions until the time, year, month and day are confirmed to be correct. If there is something wrong, press the two keys on the right to add and subtract, the upper right is MINUS and the lower right is plus. Press the key in the upper left corner to exit.
Casio is a brand owned by a Japanese company, which produces electronic instruments and electronic calculators. The original intention of Casio TR series is also to create a top beauty shooting experience for women. The latest light and shadow beauty function can show the natural skin state even when shooting in the dark.