MDHT-001 Human Sensor Equipped Purchased in 2016 from Rakuten's Modern Deco. There are scratches and stains commensurate with age. I kept it in the bathroom, but I rarely used it because the warmth from inside the house was sufficient. I have checked the operation before listing, and there are no problems at all. I have cleaned it to some extent, but some debris still sticks to the black filter inside (photo 12). There may also be areas that I couldn't completely clean, but please understand that this is a used item. There is no instruction manual. I think it is sufficient to warm up small spaces such as bathrooms and toilets. For your information, the company written on the back, HKY Co., Ltd., is the same company as Modern Deco.