Healthvit Flora Reed Diffusers are an easy and elegant way to ass fragrance to your personal environment. It works on the principle of capillary action. When porous reeds are immersed in a ceramic pot of fragrance oil, fragrance travels up the reeds and gently permeates the room. A 24 hours aromatic experience. No fire, no ash, truly maintenance free. Fragrance oil will last for 25-30 days.