A motor driven assembly encased in a sturdy metal box made of specifically designed two part aluminium extrusion with insulated plastic side supports for safety. The motor driven lower roller rotates the upper roller assembly located on top of the insulated Perspex pipe through a removable rubber belt.
The motor operates on 230V AC supplied through a fused input socket. Under favourable conditions the unit can produce a potential of up to 200kV with a spark of up to 80mm in length. A 4mm socket terminal is provided to earth the discharge sphere with an additional 4mm terminal on the main dome for attaching the accessories.