1) insert the index finger into the flexible--ring, and adjust your finger position until you feel confortable and move the mouse smoothly 2) do not adjust the finger too tight or it will interfer with the effect of blood circlution. 3) align your index finger tip and the finger mouse light sensor tip to the same height 4) use your thomp to control the upper button lower bottun and scroll wheel 5) place your middle finger at the grip eara to provide support when you are double-clicking. 6) contact the finger moue light sensor tip to the surface for operation