The classic Van de Graff Generator device demonstrates some of the fundamental concepts in electrostatics: charge accumulation, potential differences, capacitance, and resistivity. The Generator's conductor sphere is detachable, the engine speed is adjustable (alternatively the device can be operated manually) and the device includes a small discharge sphere on a rod. The generator supplies a safe DC voltage of max. 200 kV and comes with electrostatic whirl and electrostatic plume.