Thank you for viewing! The following is quoted from the sales site: BliGold FKA4100014 Electrode Unit, Chlorine Dioxide Space Purifier, Ziaino Compatible, Panasonic Please be sure to check the compatible main unit model number and confirm whether it is a compatible model before ordering. Model number: FKA4100014 Compatible main unit models: F-MV1000-W/F-MV1300-W/F-MVB10-W/F-MVB13-W/F-JX1100V-W/F-MC1000V-W/F-MV1100-W/F-MVB11-W/F-MVB21-WZ/F-MVB15-WZ/F-MV1500-WZ/F-MV2100-WZ Replacement目安 (Guide): Approximately 3 years (when operating 12 hours a day) ※This item is a beautiful/unused item. We have checked it, but since it is stored at home, there may be minor deterioration that is not noticeable even if it is a new, unused item. Thank you for your understanding. If there are any problems, please contact us via the transaction message before evaluating the receipt. ☆ Immediate purchase is welcome ☆ We plan to ship via Mercari delivery ☆ Please note that the time slots for checking and replying to comments vary depending on the day.