Intelligent mode and 3 manual mist speed settings Be 100% in control of the way you run the humidifier. There?s a built-in humidity sensor that keeps a healthy humidity level at home. Additionally, the top fill humidifier has 3 manual settings to switch between low, medium, and high output speed. Cleaning and refilling is a breeze The humidifier is quick and easy to run. It takes only a couple of minutes to refill the unit - just pour the water directly into the water tank without removing the cap! Thanks to a transparent water gauge, you will be able to estimate how much time is left to the next refill. Geniani 2-in-1 Humidifier & Diffuser Moisturizing the room with cool mist highly improves the quality of sleep, skin condition, and work productivity. With a built-in diffuser, you will also be able to add a touch of aroma into the air. Geniani humidifiers with essential oils help relax after a busy workday. Fill your home with fresh and clean air with the New Ultrasonic Humidifier! Fresh air is crucial for having a healthy and productive lifestyle. If you want to find a humidifier that is easy to use, has a sleek design, and runs smoothly, this one is for you. Key features: 4L top-fill water tank that lasts up to 18 hours 2-in-1: a humidifier works as an essential oil diffuser Intelligent mode with built-in humidity sensor Large space coverage up to 220 sq. ft. LED Night Light with a turn off option Auto shut-off Runs all-day The humidifier has a plentiful tank capacity (4L of water) that can moisturize a large room for over 18 hours on the highest speed mode and up to 24 hours at a low-speed mode. Ultrasonically quiet The Geniani 4L humidifier runs noiselessly. You will be able to place it next to the bed and still enjoy full sleep, put it at the office, and stay fully concentrated.