Bring a little Zen to your home or office space with Sharper Image Color Changing Himalayan Salt Crystal Lamp! A built-in color changing LED light delivers a soothing ambience which may help improve overall mood, provide stress relief, and relax restless minds. The USB lamp is crafted from pure Himalayan pink crystal salt, which is known for its anti-microbial properties. Simply plug the lamp into your USB input and the gentle warmth activates negative ion compounds to clean and purify the air around you.