A few things to be aware of when importing electronics as the most insignificant detail can save you $$$. Many electronic items can fall under various categories in the harmonized tariff schedule, each with its corresponding duty rate. The more specific the information as provided to the customs broker and the more experienced the broker's classification experience, the better the importer's chances of saving $$$.
Electronic items can also be subject to other government agency requirements. For example, FDA and FCC.