The Best Choice for You -- With 3 mist levels (High/Medium/Low) available for you to choose from, you also have the option of controlling the mist direction. At the touch of your finger, the cool mist humidifier creates the level of humidity you need and delivers mist to every corner of the room. Designed for Lazy Bones -- The 4L capacity TOP FILL water tank measures at 7" high for an effortless faucet fill and runs for up to 28 hours on a single fill. Our air humidifier automatically Shuts-off when it runs out of water or the water tank is removed. Deep Sleep Mode –BAYKA bedroom humidifier is fitted with ultrasonic vibrating diaphragms that force tiny drips of water into the air. This feature makes the humidifier quieter than others. Turn off the nightlight by pressing the touch panel for 3s. Enjoy all night mist and rest easily. Easy to Clean -- The baby humidifiers need to be cleaned regularly to prevent grime and dust build-up in the water tank. The water tank has a flat surface and a 4. 5’’ x 2. 8’’ water inlet that allows you to hand clean and dry the tank to get pure mist. More than Humidifier -- As our humidifier comes with an Aromatherapy Box, you can drop essential oil on the sponge ring and enjoy the mist and fragrance at the same time (Please note that the essential oil is not included).