When you touch the Morse code, and then decoded into alphanumeric characters.

If touch the code can not be decoded will display a "#".
Character of the separator will display the △.
Word separator will display the □.

Help button : To display the available characters in Morse code.
Clear button : It clears the display contents.
Exit button : Exit the app.

When you press the setting key to display the settings screen.
In setting screen can be specified to enable / disable the touch sound and vibration.