This is a Yukapet EX S size from Kainuma Sangyo. It is not the current LX model. (Please be sure to note this) I used it for one season after purchase, but my pet hardly used it, so I put it away. It does heat up properly, so it's a waste to throw it away. I'm offering it for sale, hoping someone will use it. If you were interested but thought it was expensive, how about giving it a try? I tested it for about an hour and it worked fine. However, as it is an electrical appliance, there is a possibility of defects. No claims and no returns, please.