HTS code 9902.15.87 covers "Electromechanical cat toys, each depicting a bird in a cage, such toy bird of textile materials with magnet inside its body and suspended by a string from the top of a cage comprising plastic ribs; such cage sitting on a base of plastics that contains the electrical components; with cage base having a magnetic coil designed to switch polarity and cause the bird to be in a state of continuous motion (provided for in subheading 8479.89.94)" 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.