Fanless and filterless, it makes no sounds and needs no upkeep, but you need to remember to clean from the ionized dust that builds up around it over the wall. This ionizer water machine is strong and trustworthy. It's relatively straightforward to set up and has seven different ionization settings, https://allhealthmarket.com/product/home-care-2/hydrogen-generator/hydrogen-inhalation-machine-300ml-450ml-hydrogen-water-generator-h2-inhaler-therapy-hydrogen-gas-generator-water-purifier-ionizer/