The U.S. dollar is the currency most used in international transactions. Several countries use the U.S. dollar as their official currency, and many others allow it to be used in a de facto capacity. It's known locally as a buck or greenback.
The sheqel has been a freely convertible currency since January 1, 2003. The currency is not produced in Israel, as the country has no mint. Instead banknotes are imported by air and coins by sea.