Thank you for viewing. Ion generator: Plasmacluster 7000 Approximate applicable floor area for ions: Approximately 9 tatami mats (approx. 14.85 square meters) You can add water from the top with an easy-to-use, familiar container. The water level sensor detects the amount of water in the tray and notifies you with sound and light. The water level is easily visible through the translucent tray. The tank has been cleaned. (Although some calcium deposits remain, cleaning has been completed. Please understand.) Everything in the photos is included. The filter is not included.