Main functions- Set a photo album photo, image, or 56 types of floral illustrations as the background image.- Set the background color with the slide bar that expresses 360 colors- Select the text color from 6 colors- You can check the combination of colors selected on the background setting screen in the display example.- Real-time display of calculation results up to that point even while entering a calculation formula- In order to correct typos, you can delete the entered formula from the back one character at a time.- Set the background color of the number buttons and action buttons other than numbers from 360 colors respectively.- Set the text color of the button from 6 types- Sound effect setting when the button is pressed (7 types of sound effects)