CO2 laser comes with an air compressor, which can also be purchased separately. This quiet and brush-less air pump can be used together with most CO2 laser engravers. The oil-less diaphragm eliminates deposition of oil molecules on laser head optics. It also works to maintain optimal air pressure to blow away vaporized particles while preventing machine from overheating. The air pump is a must have for clean mirrors, lenses, and a longer lifetime of laser.