Ioniser is a device that is intended to purify the air. It generates millions of negative ions to clean your air and freshen your indoor environment through the use of natural fiber. The negative ions help reduce suspended particulate, and at the same time, make it difficult for pollutants to become airborne in the first place. Negative ions are odorless, tasteless, and invisible molecules that we inhale in abundance in certain environments. Think mountains, waterfalls, and beaches. Once they reach our bloodstream, negative ions are believed to produce biochemical reactions that increase levels of the mood chemical serotonin, helping to alleviate depression, relieve stress, and boost our daytime energy.