This property defines the Unicodes which belongs to Latin Extended B block
Characters like ƀ,Ɓ,Ƃ, etc. are listed under Latin Extended B Block.
208 Characters are present in Latin Extended B Block starting with the Unicode point U+0180 that represents the character ƀ.
Currently, as per latest version 15.0.0, Unicode supports 328 number of Block. Here are a few examples - Latin Extended E,Adlam,Aegean Numbers, etc.