Plasma cluster generation unit IZ-C75S, made by SHARP, is an accessory for air purifiers. - Model: IZ-C75S - Type: Plasma cluster generation unit - Brand: SHARP Thank you for viewing. I purchased this from Yamada Denki Rakuten Ichiba store. It is a genuine product. When I opened the box, I noticed the size difference and realized I had the wrong model number. I have not taken the product out of the packaging. The top of the box was torn when I opened it. Since it has been opened, please refrain from purchasing if you are concerned. I plan to ship it via Yu-Pack in the condition shown in the photos. Thank you.