High purity: Purifies the air by using extracted high purity crystal salts from the Himalayan mountains. Eliminates positive ions: Works by releasing negative ions into the air, which eliminate the positive ions in the environment (created from computers, televisions etc). The salts purify, creating an effect similar to an ionizer. Colour options: Choose from a black or white base. LED light: The LED light inside has an atmospheric colour-changing function. Crystal salt lamp: Get this natural Himalayan salt crystal lamp! Ambiance: The light creates a unique ambiance, making you feel peaceful and helps the quality of your sleep. It creates a relaxing and serene atmosphere - perfect for your home or office! Natural Himalayan Crystal Salt Lamp Usb | White | Living Social