1. Wellda system.(Patented) a. No filter used to remove heavy metals and foreign substances. b. Available to use semi-permanent. 2. Elvan Stone treated Mineral Filter(Patented) a. The combination of shungite filter and elvan stone produces and supplies a large amount of mineral ingredients. b. Semi-permanent usable filters and elvan stone. 3. Chlorine Separating Filter. The life-time of chlorine separating filter has been improved at least 7 times, minimizing its maintenance costs. 4. Oxygen Dissolving Bubble Tip(Patented) Contribute to a healthy life by providing soft water that maximizes dissolved oxygen by installing bubble tips at the end of drinking water supply. (effect of more than 30% of tap water) 5. Zero CO2 generation by not using electricity, contributing to the improvement of the global environment. 6. Available to connect directly to tap water at home (DIY-enabled product)