From the page: "The graphical displays of the phones Nokia 3310 is characterized by a superb value for money, because for a small fee you can get a resolution of 84 x 48 pixels, with integrated controller, and a contrast and speed of response quite acceptable. In addition, they are only required 5 data lines from the microcontroller, even less than the traditional LCD text modules. This library provides all basic operations from points, lines, circles and text functions to bitmap functions." - Martin Maly