Keep Inside Daytime Privacy: Mirror window tint effect up to 80-95% privacy protect, enjoy comfortable and safe in home and office space, neighbors can't see inside you clearly see outside during day, the lighter outside the better privacy inside Reduce Glare & Block UV: Silver surface blocks out 97% uv rays and reduce sun glare, softer light make a cozy rest in room, prevents furniture aging and protect skin due to UV hit, relieve eye fatigue on computer and cell phone Heat Control & Energy Saving: Window cling keeps rooms cool in hot times and warm in cold seasons, enjoying decent temprature in room and saving on electricity bill Static Cling & Reusable: Easy to install only use water stick, reusabele for long time and remove no residue on glass, suit for home and office use How to Install More Efficiently?: 1.First-time users follow instructions and video install will easier, remember peel off protective film 2.Large size glass two people do it easier 3. Privacy effect reduced at night, need drawn curtain in bedroom, and living room as needed, not suitable for bathroom