This is an Aqua Qualia RO water purifier. I purchased a used, good-condition one to use in my kitchen at home, but I decided to use a different water purifier and am now selling this one. Since I haven't used it, I'll include the description from the seller at the time of purchase: Upon inspection, there was a small crack in the hose on the back. You will likely need to replace it before use. --- Thank you for viewing. High-performance water purifier, reverse osmosis water purifier Aqua Qualia Aqua Qualia Under-sink type. I had it installed in my system kitchen when the house was newly built, but I removed it because it was time to replace the filters. You can think of it as the same device as the RO membrane water purifiers installed in supermarkets and large shopping malls. Installation period: 6 years and 8 months. Actual usage period: Approximately 6 years, about 5 liters per day. Purchase price: 275,000 yen (tax included) The following is extracted from the manufacturer: "We want to make it tankless to save space!" "We want you to drink fresher water!" To make using a reverse osmosis water purifier more comfortable, we tried to create a tankless model. We procured the most advanced parts in the world for each component, repeated trial and error, and continued to challenge ourselves. As a result, the domestic reverse osmosis membrane water purifier "Aqua Qualia" was finally born. Reverse osmosis membranes thoroughly remove harmful substances in water. However, they also remove mineral components, which are said to affect the taste of water. Therefore, by incorporating a mineral filter developed by Wastec Co., Ltd. (Tokyo) using JAXA technology, we have made it possible to add natural mineral components to pure water. *Please replace the internal filters before use. After-sales parts such as replacement parts are listed in the instruction manual. There are 3 types of filters, and replacing all of them costs about 50,000 yen. *The filter prices are listed in the photos. *Please have someone with knowledge or a professional installer install it. Size: Height: 41cm Depth: 32cm Width: 14.5cm Weight: 12kg Type: Countertop/Built-in water purifier