This property defines the Unicodes which have Vai script
Characters like ꔀ,ꔁ,ꔂ, etc. are listed under Vai Script.
300 Characters are present in Vai Script starting with the Unicode point U+A500 that represents the character ꔀ.
Currently, as per latest version 15.0.0, Unicode supports 164 number of Script. Here are a few examples - Adlam,Ahom,Anatolian Hieroglyphs, etc.