The Airome 100 mL Medium Ultrasonic Essential Oil Diffuser works by using slight vibrations to emit a fine mist of cool water carrying your favorite essential oil. All Airome products are made using quality materials of ceramic, porcelain, glass, and metal. The medium 100 mL diffuser allows you to enjoy a mist of essential oils for up to 8 hours. From traditional and classic to modern and geometric, we've created a variety of styles for every mood and decor. Your choice of two settings of intermittent, which will run for 8 hours, or continuous, which runs for 4 hours. Diffuser automatically shuts off when water runs out. Design Emulating Scandinavian hand-carved style, the ceramic sleave has a walnut wood-look pattern on a black base. Add a little hygge to your aromatherapy experience! Lights Choose between 8 LED Light colors for a single color glow, or allow light to effortlessly rotate between all colors. Set to fit your mood, holiday or decor! Mist Settings Features 2 mist settings. Intermittent, which lasts for 8 hours, and Continual, which lasts for 4 hours. Both with automatically shut off when water tank is empty. Tank holds 100 mL of liquid. Pure And Natural Fragrance Recommended use with our 100% pure, therapeutic grade essential oil singles and blends or our all-natural AiromeScents blends. Sold separately.