Thank you for viewing. I am selling this because I replaced it with a new water purifier unit after using it for about 2-3 years. It works without any problems. The product is only the water purifier unit. You can switch between raw water and purified water by inserting a cartridge. If you don't insert a cartridge, the switch button won't work. I will include a cartridge that was used for about 3 months for testing purposes. It has been sun-dried. If you don't need it, I can exclude it. Please let me know. It looks clean overall, but there are some minor scratches. I have always taken care of it, but there are some minor scratches and dirt. I did a simple cleaning before listing it. I have inspected it carefully, but as it is a used item and inspected by an amateur, please refrain from purchasing if you are nervous or seeking perfection.