Himalayan Salt Lamps produce negative ions (anions) which are scientifically proven to enhance health, environment and well-being. High levels of anions are found in natural surroundings such as mountains, forests and waterfalls. They help neutralize the positive ions emitted from televisions, computers, artificial air conditioners, etc. Fight free radicals while enhancing the beauty of your home and office. Carved by local artisans in Northern Pakistan. Oval shape.