The technology used in Bamboo Stylus fineline detects which how pressure you press down your stylus onto the screen. Adjusting the pressure influences how the lines appear on the screen. Just like a real pencil on paper, pressing harder makes the line bolder and by pressing lighter the line becomes thinner. Pressure sensing is the key
feature to make your stylus react as natural as possible. Supporting apps have various pen tools implemented which support this pressure sensing feature.