This white ultrasonic humidifier (cold or warm mist) has a 6L water tank with an automatic shut-off once the water runs out. It also has 3 adjustable mist levels with a 360 degree rotating nozzle. It is very quiet (<30dB) and has a timer that can be set from 1-12 hours. The water tank is removable but can be filled while still in the machine. It also comes with a brush to clean the inside of the tank. It is equipped with an LED screen, a remote control, and a built-in essential oil diffuser (essential oils not included).