A speaker mounting structure is provided in which a speaker frame is fixed to a mounting panel by engaging latching hooks and a latching clip provided on the speaker frame with mounting holes formed in the inner panel of an automobile door. The ceramic shade includes a primary chamber defined therein and at least one through hole in communication with the primary chamber. Namely, the light box housing supports at least two light sources, the display signages and the light-directing panel. Administration of the liposomes results in cellular internalization and destabilization of the liposome for intracellular delivery of the entrapped agent.