Complex sentence: The device has a CE mark, which allows the Shang Ring to be sold and used in the European Union, has received clearance by the U.S. Food and Drug Administration for sale and use in the United States.
Split into simpler sentences: The device has a CE mark, which allows the Shang Ring to be sold and used in the European Union. It has received clearance by the U.S. Food and Drug Administration for sale and use in the United States.