Our patented liquid glass evenly disperses over your entire screen, including existing scratches and scuffs, and hardens to create an impenetrable edge to edge barrier while repairing former cracks and imperfections.Before installation!!!Must use the sticker block the speaker hole to prevent the UV liquid inflow.Unlike other common screen protectors, IQ Shield protectors are crafted using a revolutionary process that combines high response accuracy, durability, non-yellowing and clear transparency into a single layer of flexible yet tough film.