Produces 12 or 24V electricity. Housing made of anodized aluminum and stainless steel. Blades are made of fiberglass-reinforced nylon. Motor locking device in the "OFF" position. The item is equipped with a Run / Stop switch, which allows the turbine to operate at unusual voltages and currents generated by the turbine and to be electrically isolated from battery systems. This switch acts as a temporary brake for the blades; it should not be used to stop the turbine for a long period.