Deerma DEM-F301 is an air humidifier that can hold up to 2.5L of water to provide long-lasting mist for your home or office. The device operates silently with an ultrasonic technology, ensuring a peaceful environment for you to work or sleep in. This humidifier also doubles as an aroma diffuser, allowing you to add your favorite essential oils for a pleasant fragrance in the air. The Deerma DEM-F301 includes a purifying function, which helps to remove impurities and bacteria in the air, promoting a healthier environment.