Indusclassic 7 Inch Himalayan Salt Lamp Natural Crystal Rock Ionizer Air Purifier, 4-7 Lbs, 2 Kg Works as an air purifier by emitting negative ions into the air and light therapy to reduce stress and increase energy Unique salt lamp is made from Natural Himalayan salt crystals hand mined in the Himalayan Mountains Heating the salt with bulb releases negative ions into the air, creating an effect similar to an ionizer, purifying the surrounding air Great Gift Idea Natural Rock Salt Use it for both home & Office, Memorable gift for Birthday, Wedding, Anniversary Each Natural Salt Lamp Comes with 15-watt bulb, on/off switch and 6-feet electric cord