1.Window film the privacy effect will be different as the light and angle changes.</br> 2.Single plane fluoroscopy:One-way perspective refers to the strong light intensity side can't see the dark side of the light, which means when indoor light is stronger than outdoor, people outside can see people inside.In general,people outside can't see people inside during daytime.</br> 3.Different effect between daytime and night:The outside glass will show a mirror effect as well as keep your privacy during daytime, when evening indoor light is stronger,then the glass outside will lose mirror effect as well as outside people can see inside.</br> 4.Mirror effect:The mirror effect we said means it has a slightly reflective effect,not totally like a mirror.<br> 5.Peel off the backing transparent protective film, paste the film to the window and use your hand to press it from the top down so that it can tightly attach to the surface, put protective film on window film before squeegee away water and air bubbles,prevent damaging window film.