The himalayan crystal salt lamp from brookstone is perfect for adding a glow of serenity to any space. Each crystal is hand-carved from pink salt, making your lamp totally one-of-a-kind. A built-in dimmer switch allows you to adjust the intensity of the light according to your mood. . Not only does the himalayan crystal salt lamp emit a warm radiance, it also acts as an air purifier by ionizing particulate matter in the air and eliminating odors. This natural wonder will uniquely enhance and complement any home or office. Comes with a 15 watt bulb electrical ratings: 120volts, 60hz, 40w max no installation required features unique hand carved design made from natural pink salt reduces environmental odors to enourage respiiratory health purifies and detoes your space with clearer air qualit naturally ionizes contaminants and other particles in the vicinity promotes a sense of calm in your space after a tiresome day battery built in dimmer