This is a Marukan small animal heater. I bought it for my parakeet, but I only used it once and then stored it. The pink side is high, and the brown side is low. It's a reversible type that can be used on both sides. There is a little dirt on the pink surface. Operation has been confirmed. The warranty period has expired. There is no box or instruction manual. This item has been stored at home. *I am also selling this on other sites, so I may delete or cancel the listing without notice.