Made in 2012. I used it for about six months, but it's been stored in the closet since then. I've confirmed that it works. The filter has dust on it. It's small, so it can be used in various places such as around a desk, in a bedroom, or in a toilet. Please purchase if you understand. Air purifiers equipped with ion generation technology, the Plasma Cluster-25000 and -23000 models. - Model Name: Plasma Cluster-25000 - Model Name: Plasma Cluster-23000 - Function: Air purifier - Technology: Ion generation technology Thank you for viewing.