This is the cat sensor for the automatic cleaning cat toilet, as shown in the image. This is a part that tends to break unexpectedly, even though the main unit is expensive. When this breaks, the automatic cleaning doesn't start, and the unit becomes inoperable, with the cat sensor constantly activated. The unit itself is not sold separately, and repairs, including international shipping, can cost nearly 10,000 yen. You can easily replace it by removing the screws from the unit. If you're going to buy litter in case of a sudden breakdown, why not get a spare sensor? ◆ Please purchase at the listed price, which includes shipping. No individual sales. ◆ Standard comments, "just in case," or unreasonable price negotiation comments will be deleted or, in some cases, blocked. ◆ This is a reused item, intended for those who need it. Please refrain from purchasing if you expect the quality of a new item or store-bought product, including packaging. ◆ Please be sure to check the shape, condition, and compatibility by referring to the photos. Returns are not accepted. Please ask any questions in the comments. ◆ The description and photos represent everything included. This is a used item, so it is not perfect. Please consider carefully before purchasing.