The Multi-Ionizer is an ionization device that uses 10,200 gauss of magnetism and the effects of noble serpentine to convert water into water rich in negative ions. When attached to a washing machine, it allows you to wash clothes without detergent. It has antibacterial and deodorizing effects, leaving clothes fresh and odor-free! It's especially safe for babies, children, and people with allergies! My family also uses it. It can be installed by women as well. Purchased around December 2023 for 27,000 yen. I would be happy if you would buy and use it. Thank you.