Morse Code Chart is an item in White Day: A Labyrinth Named School (Remake).
The Chart has written the Morse code indicating from 0 to 9.
If you get it, you can find out the box's password at Music Appreciation Room wall, New Building.
Looking at the movement of the sliding weight of metronome and understand Morse code.
[ The quick movement of the weight represents a dot and The slowly movement of the weight represents a dash ]
Metronome is in the Music Supplies Room, Main Building Section 2.
You can get a total of 21 dots or dashes in metronome. ( The Final movement represents the end )
In the box, you can acquire the School Ghost Stories (9).