Unlike many others we have tested, this one works really great!
This device generates static electric charge at higher current (and lower voltage) than the Van de Graaff. It consists of two high resistance plastic discs with equally spaced metal sections. The discs rotate in opposite directions with a hand crank, producing substantial opposite charges which are deposited in the capacitors and on the metal electrodes. You can collect induced charge with the brushes and adjust the electrodes and Leyden Jar capacitors for higher potential. Fully assembled, mounted on plastic base, works right out of the box.