The main parts of the pen mouse include a cheap mouse with a failing scroll wheel, a bingo pen, and the base from an old web camera. There’s also a normal-sized pen to act as the handpiece.

Lexip’s first joystick is internal and controlled by tilting the mouse shell. It can register over 300,000 joystick positions by simply tilting it left, right, up, or down +/- 20 degrees.