The Airomé Ultrasonic Essential Oil Diffuser uses gentle vibrations to create a fine mist of cool water and essential oil. Made of high-end materials like ceramic, porcelain, glass, and metal. Offered in your choice of 100 ml or 250 ml capacity, which allows you to enjoy a mist of essential oils for up to 24 hours. From traditional and classic to modern and geometric, we've created a variety of styles for every mood and decor. The 100 ml diffuser can run 3 hours with continuous mist, or 6 hours with intermittent mist. The 250 ml diffuser can run 10 hours with continuous mist, or 24 hours with intermittent mist. Both sizes feature 8 LED light colors.