When the screen backlight is turned off: the screen protector can act as a mirror, you can enjoy high definition mirror effect.
When the display is turned on: the screen can be clearly seen and used as usual.
This screen protector can protect the LCD from scratch,if there is ash on it,you can erase it by a cloth ,the LCD can rechange to new.
It will not affect the stylus using if you stick the screen protector on LCD.
Compatible Models: Apple iPhone 4