After receiving the Levoit Classic 300S Smart Ultrasonic Smart Humidifier. This Humidifier is Awesome! I set it up immediately with my favorite fragrance oil to use for aromatherapy. I also use it to provide moisture in the air. This humidifier tank is big. It holds 6 liters of water and provides continuous mist for up to 60 hours. It also has a night light. I downloaded the app on my phone and can control it with my phone. It is easy to set up and use. I love it!