OV-3 model’s shell is made of PP plastic which is anti-corrosive and anti-falling. And with the built-in simple button design, users can manually select settings including time period and concentration which allows them to make diversified settings according to environment. Its new technology that combines cold filtered air and high-pressure air fully atomizes essential oils into small particles for efficient diffusion without the additional operation of heating or water, bringing high-quality fragrance to your entire space in just a few minutes