Inventory low and will no longer be available. Get them while they last! Best of both worlds - Air purifying and all the other salt lamp benefits combined with aromatherapy! Add a few drops of your favorite essential oil in metal cup provided. Insert light bulb under the salt lamp until it touches cup so oil can warm. Heat is enough to add a gentle aroma to your environment without damaging the properties of the oil. Weight 7.5 to 8.5 lbs.