Regarding Smart Film, its breakthrough feature is that the customer could easily and directly roll and adhere Smart Film to glasses by simply peeling off its protective film without adding any extra adhesive in-between Smart Film and the glasses, and also can repetitively adhere Smart Film to the glasses in case of installation misalignment. In addition, Smart Film is different from traditional privacy glasses which need longer delivery lead time, higher installation cost, higher transportation cost due to glass weight, and disassemble existing glass at sites.