Features & details [POWERFUL HUMNIDIFICATION]: With over 4L/1.06 gallon of water, the cool mist humidifier lasts for 50 hour working time on a full tank; Long-range mist via the 360 rotatable nozzle at a height of up to 3.5ft to efficiently humidify your room. Designed to humidify the air in large rooms up to 10-30 m² / 108-323 ft². [OPTIONAL NIGHT LIGHT]: Humidifiers for bedroom with a soft night light promote sweet dreams – hold for 1.5s to turn on/off the tank light (Note: The night light is separately controlled. You can turn on / off the night light when the unit and mist is off) . [Quiet Operation]: Patented water dripping system reduces the working noise under 26 dB for a comfortable and quiet environment for sleep or study. [AUTO SHUT-OFF]: Smart Personal Humidifier with Low Water Warning,The ultrasonic air humidifier will stop misting to prevent the device from overheating when the water is drained or when water tank is lifted. Dustproof sponge prevents dust from entering the humidifier with a lengthy life span. [EASY TO CLEAN]: Wide opening up to 90mm for you to refill and clean the machine with ease and convenience. There won’t be any spill when filling, and you can fit your hand into the tank to clean it thoroughly.