Himalayan salt lamps are made from beautiful Himalayan crystal salt that is mined in the foothills of the Himalayan Mountains. The natural color of a salt lamp adds beauty to any decor.USB Salt Lamps are truly unique with a white Himalayan salt crystal that changes colors when plugged in to a computer or USB adaptor.Care for Your Salt Lamp: Salt lamps may sweat with excessive humidity. If moisture begins to collect on the surface of your salt lamp, turn it off and wipe it down with a cloth. Your lamp should not be sprinkled with water or left outdoors. To dust your salt lamp, simply wipe with a damp cloth. Please keep a dish or coaster under the salt lamp to protect delicate surfaces. For indoor use only.Note: Evolution Salt Co’s salt lamps are handcrafted making each piece unique. Color, shape, size and weight may vary. USB adaptor not included.