sw pdlc smart film electric smart glass switchable window tint for home, office, bathroom and meeting room, a4 size sample, 8.3”x11.7” sw privacy protection and room partition : the first function is privacy protection . transform from opaque barrier to a clear state. allows architects and contractors to provide creative design concepts on demand . rear projection screen : great solution for a rear-projection screen with high contrast. explosion- proof : no distraction of shutters blinds or drapes. heat insulation : smart film can block sun solar energy, 99%uv, 98% ir rays.protecting your interiors fading and yellowing. and meanwhile, can protect people from disease caused by direct sunlight. sound insulation : can block noise by 20% more than normal glass. multiple control : different style controls like remote control, wall switch