Most privacy protectors only hide the screen from the left and right sides. If someone leans over your shoulder or looks from below while you are in landscape mode, your screen is still visible. A 4-way protector solves this by adding vertical louvers to the horizontal ones. Key Features & Performance 360° Multi-Directional Privacy: Using advanced micro-louver technology, the screen appears completely black to anyone viewing it from a 30-degree angle or greater. This covers “over-the-shoulder” viewing in portrait mode and “side-on” viewing in landscape mode. Orientation Versatility: Ideal for users who frequently switch between apps. You get the same level of privacy while scrolling through emails (Portrait) as you do while watching movies on a plane or train (Landscape). Blue Light & Eye Protection: Many premium 4-way models (like those from StarTech or ZAGG) incorporate a blue light filter that blocks up to 50% of harmful rays, reducing eye strain during prolonged use. Full-Screen Integration: Designed specifically for the iPhone 15 Plus, these protectors feature precise cutouts for the Dynamic Island and sensors, ensuring that FaceID and front-facing camera quality are never compromised.