It is an on-demand and on-board device that creates hydrogen and oxygen gases, through the electrolysis of water.  These gases are injected directly into the engine via the vehicle’s air intake system, only when the engine is running. Hydrogen and oxygen gases serve as a catalyst to improve the “combustion efficiency” of the ICE. This results in a near-complete burn of the fossil fuels and effectively reduces tailpipe emissions and Green House gases, while reducing fuel consumption.