HTS code 9902.16.27 covers "Litterboxes, each with self-contained electric motor powered by an external adapter that plugs into a wall socket or electrical outlet and may have batteries for back-up, such devices which rake and/or disperse cat waste into a compartment after a certain amount of time has passed once the mechanism is triggered by cat entering the litterbox; the foregoing designed for domestic use (provided for in subheading 8509.80.50)" under the US Harmonized Tariff Schedule. This is the official duty rate charged by US Customs when this product is imported into the United States, sourced directly from the U.S. International Trade Commission and refreshed daily.