This humidifier has low, medium, & high modes with a 6L/1.6 gallon water tank and 360 degree rotatable mist nozzles that provide both cool & warm mists, covering up to 550 sq. ft. The top filling design enables you to fill the water tank directly from the top and the transparent water tank makes it convenient to monitor the water level easily. There is a built-in humidity sensor that can be adjusted to personalize the most comfortable level. It has an LED display with touch-control to conveniently activate features like mist level, humidity, timer and night light (a remote control is also included). It is very quiet in sleep mode (<30dB) and the timer can be set from 1-12 hours. It also accommodates essential oils to create a calming atmosphere.