Henes Products Corporation OH-1 oxygen hydrogen discrete gas generator. Powers up fan runs don't know how to test except with a match and a big kaboom .

Dial shows it produces up to 400 ml of hydrogen per minute - 24 litre per hour.

Contains liquid postassium hydroxide - therefore shipping will be $50 for me to prepare it for shipping plus actual cost of shipping. Local pick up would be better. s-e Florida .