HTS code 9902.16.28 covers "Feeders, each with a self-contained electric motor powered by an external adapter that plugs into a wall socket or electrical outlet or uses batteries, such devices which can be programmed to disperse various quantities of food at pre-set times, designed for domestic use by dogs and cats (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.