HTS code 9902.17.41 covers "Output-only signal generators, each with configurable phases and harmonics designed for calibrating power and energy equipment, the foregoing without a recording device (provided for in subheading 9030.89.01)." 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.