Amzer Privacy Screen Protector Shield for BlackBerry Curve 8520 Screen will be completely black when viewed from left or right at the 35 degree angle. Maintain the privacy of your screen when you are in a crowded area, such as bus, train, airplane, etc. Attaches smoothly with self-adhering surface; leaves no residue when removed. Privacy filter is manufactured to provide thick, durable, transparent surface. 99% UV Protection: Reduces eye strain caused by the screen.