This property defines the Unicodes which have Braille script
Characters like ⠀,⠁,⠂, etc. are listed under Braille Script.
256 Characters are present in Braille Script starting with the Unicode point U+2800 that represents the character ⠀.
Currently, as per latest version 15.0.0, Unicode supports 164 number of Script. Here are a few examples - Adlam,Ahom,Anatolian Hieroglyphs, etc.