Our Harmony mist diffuser disperses a steady, gentle mist into the air of the environment, removing any unwanted odours and replacing them with a natural, fresh smell created with essential oils. The Harmony is a quiet device that can fit perfectly in any environment around your home, office and working environment. The colour changing feature can be set to individual colours, or a gradient mix. For best results, use the Harmony Mist Diffuser with PowAir Liquids. PowAir Liquids will come in a concentrated state, so if too strong, dilute with water until satisfied with strength.