Features: [Top-fill Design]The air humidifier with a top-fill design, make it easy to refill the water, and the water level also can be observed from the visible window. [Digital Display]The top can display the real-time power of the lithium battery, reminding you to charge in time when the battery is low. [Auto-Off]This humidifier will automatically shut off after 9 hours. No worry about damaging the device itself or causing danger to users. [Keep You Healthy]This personal humidifier can not only help adjust dry air in the air-conditioned room but also moisturizes your skin, relieves nasal congestion, and purifies the air, keep you healthy all the time. [Cool Mist]Safely moisturizes the air for continuous operation so you can breathe easily and get more restful sleep.