The O'Connell Mentalist Pad is a pocket note case for the "Any number effect." The best you can get. The quality and the design of the Mentalist pad will allow it to be freely handled and written on by your helpers. The clever construction adds to the look of being just a normal note pad, because the working parts are completely hidden out of sight. Three or more people in your audience write a number on the Mentalist Pad (specify how many digits). Another person is asked to add up the numbers and call out the total. The total will be the same as your prediction, present as you wish. This is a great way to switch a written set of numbers, drawings or words completely innocently. Made from genuine leather. Dimensions Approximately 5" x 3"