This is a Repronizer 4D Plus. Purchased in 2023. It was dropped, and there's a rattling sound inside. It functions normally, but I think it falls into the category of "junk." There's a chip on the part where the dryer's air comes out. - Power turns on - Air volume can be adjusted - Hot and cold air can be switched The warranty has expired, and I can't fix it myself. I don't have a chance to use it, so I'm offering it for sale.