This property defines the Unicodes which belongs to Lepcha block
Characters like ᰀ,ᰁ,ᰂ, etc. are listed under Lepcha Block.
76 Characters are present in Lepcha Block starting with the Unicode point U+1C00 that represents the character ᰀ.
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.