According to the makers, the gas has the ability to bond to whatever fuel it is mixed with and create an efficient burn during combustion. They claimed that the resulting gas can also be used to power a combustion engine on its own, but consider its use as a fuel additive more commercially viable and easily integrated into the existing market.

Over the last few years, news of experiments with hydrogen fuel cell technology have been covered by the mainstream media with large energy companies investing substantial amounts for research projects finding effective, viable, and marketable solutions.

The HHOS device for hybrid hydrogen cars differentiates itself by providing, not an alternative to fossil fuel, but as an additive to both improve gas mileage and reduce levels of engine emission with absolutely no carbon dioxide.

It improves on existing technology rather than create an entirely new industry and they highlight this characteristic by repeatedly stating that the technology is "evolutionary, not revolutionary" almost like a slogan.

It can be installed on any standard piston engine, with minor modifications and easily custom-fitted to most available automobile make. They can also be sized according to engine and horsepower requirements.

The technology has not gone unquestioned. With only two test machines, both owned by Klein, doubts have been expressed as to whether they really work. Electrolysis, the process of separating hydrogen from oxygen, has been around a long time. However, Klein claims that the HHOS produces a form of gas distinct from the normal result of conventional electrolysis which allows them to use it to help power automobile engines.

The product is not yet in production and should be available sometime in 2008, according to the company website. However, with little concrete news about retail releases, it will be, quite probably, an even longer wait.