Raport systemowy and other 80,800 icons from Icons8 icon pack follow the visual guidelines of the operating systems: Windows, iOS, Android KitKat, and Material. PNG format is free up to 100x100 px. Icons are availble for download in PNG and vector (SVG, PDF, EPS, and more).
This is a picture of a computer monitor. It is one big square with a smaller rectangle in the middle which has an exclamation point inside of it. There is a dot on the bottom right for the power button.