Bring beauty and vitality to your space with this Pyramid Rock Salt Lamp. Heated salt emits negative ions that help purify the air and dilute odors. The tranquil, therapeutic, radiant color-changing LED light creates a soothing environment. Due to the natural rock, no two lamps are alike. Each crystal is unique, size, color and weight may vary. Powered by plugging into USB adaptor or computer. 55" USB cord included.