Please read the following description to the end and only purchase if you are satisfied. This product was purchased in 2012 and has been opened, but it is unused. ※Detailed explanations regarding the filter are available in the images (3rd to 5th images), so please check them. Filter Replacement: Approximately every 1-3 years (with automatic replacement notification device) Purification Speed: Approximately 2-3 hours per 15ℓ Purification Capacity: Approximately 350 liters/day (at water temperature of 25 degrees Celsius and water pressure of 3.6 kg/cm2) Water pressure required for purification is 3 atmospheres (can be used with a water heater) 【Body Size】 Width 380mm x Height 410mm x Depth 225mm 【Tank Size】 Diameter 280mm x Height 420mm Height includes the tank base and the valve on top. 【Accessories】 ・Water quality test meter ・Faucet ・5 filters (already installed) ・3 replacement filters ・Drain for wastewater ・Power transformer ・Tubes A Japanese illustrated instruction manual is included, so those who can use tools like a drill should be able to install it themselves. Easy installation methods are also described in the manual, so you should be able to install it easily by reading it. Filters are sold on Amazon and other sites, so please check. Under-sink type systems store the main unit and tank under the sink, so only the faucet part is visible above the sink. This allows you to use your kitchen space more cleanly and widely. It can also be used as a countertop unit. APEC Water Systems is at the forefront of water purification innovation, and its advanced filtration technology is outstanding. Rooted in rigorous research and development, APEC's filtration systems provide filters that skillfully trap and eliminate a wide range of contaminants, from large particles to microscopic impurities. More than just purification, APEC's technology revitalizes water, making it refreshing and health-promoting.