Hard to make sense of product description, but found a patent:<p><a href="https://data.epo.org/publication-server/document?iDocId=6120880&iFormat=0" rel="nofollow">https://data.epo.org/publication-server/document?iDocId=6120...</a><p>Apparently, hydrogen and oxygen are combusted to produce high-temperature steam, which drives a turbine to generate electricity. Inventor claims the steam can be condensed to liquid water, then the electricity can be used to to split the water into hydrogen and oxygen, allowing the cycle to continue indefinitely, which is of course impossible.<p>Didn't know the European Patent Office gave parents for perpetual motion machines.