Ditto by Ellusionist

Have you ever wanted to perform a color match or prediction routine but couldn't justify the £200 to £600 price tag? 

DITTO is a fully mechanical colour predictor that leverages gravity for its ingenious method. It has zero electronics. 
Gravity never runs out of battery. Gravity never fails to connect. 
That means you can always rely on DITTO to tell you which pens were chosen, and in what order. 
By knowing this, you can predict, read minds or even force objects. 
This is pro-level mentalism at an affordable price. 

• Explanations by Peter Turner. 
• Method inspiration, the late, great Al Koran.