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