Please be sure to read the profile. Kurita Corporation ・For drinking water during walks, use "filtered water," and switch the lever to "raw water" for cleaning up after your pet. ・Set the unit by filling a commercially available drinking water bottle with tap water. Filter Replacement Guide When using 1 liter per day: Approximately 60 days (about 2 months) Replacement Cartridges x 6 Approximately 60 days (2 months) per cartridge Includes the main unit and one year's worth of cartridges. Brand new, unused! ⚠ There is a slight dent in the box in the third photo. This does not affect the main unit! Please refrain from purchasing if you are concerned about home storage.