Please Pardon the late reply. I purchased the pictured machine from eagle-research.com/shop
It produces what is known as Browns Gas, Hydroxy, or a number of different terminologies. Quite simply it produces 2 parts Hydrogen and 1 part Oxygen from distilled water. It is a minimal maintenance machine, at least it is for me. It does require refilling with distilled water approximately every 20-22 hours of usage. You can find out a lot more by visiting their website.