An entirely "hands off" effect! Let your spectator do all the work! With your back turned, a spectator can place an object into either one of the brass canisters. Now astonish them by announcing exactly which Paradox Box they chose, sight unseen!

Comes complete with a red and green Paradox Box in a professional black presentation case. Canisters measure 1.25 in. x 1.25 in. Box measures 2.75 in. x 4 in. x 1.5 in.