Panasonic Electronic Bathroom Ventilation Switch WTA539369W 12-hour timer, adjustable from approximately 10 seconds to 12 hours Returns and refunds are not possible. Please purchase with caution. Please understand that we are not responsible for incorrect part numbers. Since it has not been checked, it is being sold as a junk item. We are sorry, but please refrain from making claims. To prevent problems, please research the product details, such as how to use and install it, by searching the part number yourself. We recommend purchase by those who are familiar with handling and understand the product. Please forgive any oversights. Due to the used nature of the product, returns, warranties, and support are not possible. Please understand this beforehand.