How do Wacom Tablets work?
WACOM Tablets take advantage of the electro-magnetic resonance technology developed by WACOM Co. Ltd. Japan, in which radio waves are sent to the stylus and returned for pen pressure and position analysis. It’s the pen, not the tablet, that determines which position and what pen pressure is registered. You can therefore rest your hand on the tablet, and even put a sheet of paper or photograph on the tablet surface and trace it.