Vibrating at 2.5 million ultrasound per second, CASA AROMA DIFFUSER, finely releases your essential oil into the air. Simply add water and a few droplets of your favorite essential oil, sit back and enjoy. This diffuser ionizes the molecules of essential oils into the air via heat-free diffusion method. It has the ability to boost the oil’s biological benefits, improve the atmosphere of your home or office and purify the air you breathe in, Designed for your safety, the device will automatically turn off either when the timer is up or when the water runs out. A great way to create the ideal ambience for entertainment or relaxation.