The orange disk that can be turned on the Casio watch in the picture is for what purpose?100 Wealth Value High Reward

Three circles are timekeeping, the bottom of the small circle is the second hand, has been turning, the left is a timekeeping 1 hour disk, the right is 12 hours, the watch is timekeeping on the line at 11 hours and 59 minutes, so the two are timekeeping disk, the left side of the turn of the circle, the right side of the hour to understand it, the watch three buttons, the top of the button to start timekeeping, after the beginning of the large dial second hand will start to rotate, usually do not turn, the bottom click to zero. Started to turn, usually do not turn, the bottom of the press to zero. The center button to pull out a section of the twist is to adjust the date, the date is best to adjust in the morning, if the date is adjusted in the afternoon, the date to the night to turn over. The outside of the big circle is a speed test, but more bullshit, meaning that you sit in the car, the car to maintain a constant speed to drive an hour, the big dial second hand points to the location of the car's average speed.