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