Glukometr and other 65,000 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 image is of a ( main shape) small sideways rectangle shape with a small square in the center and two very small vertical rectangles on the inside lower half of the main shape. There is also a teardrop shape in the very center of the icon.