Cold-air diffusers are designed to atomize a microfine mist of essential oils into the air, where they can remain suspended for several hours. They disperse essential oils without heating or burning which can render the oil therapeutically less beneficial and even create toxic compounds. There are many types of diffusers and we offer this model for its functionality and relatively low cost. Features include intermittent and continuous diffusion and an LED light control. Instruction booklet has complete usage details.