1000ML Capacity & Unique Blue LightLast up to 10-20 hours. Meeting the daily water demand. A built-in Blue Light, which can reduce the growth of harmful impurities, purify water quality and maintain health. 4 Timer & Quiet The ultrasonic humidifier has 4 timer settings, long-press the switch to choose 1H, 3H, 5H, or continuous spray mode. The noise reduction technology makes it run at lower than 28 decibel which will not affect your sleep and work. Built-in 2400mAh Battery It takes 3-4 hours to charge. It can be used for 4 hours in dual spray mode and 8 hours in single spray mode. You can see the remaining power on the screen, which is convenient for use anytime, anywhere Auto Turn Off &Top Fill DesignThis humidifier has 2 built-in water level probes which will auto turn off to eliminate safety hazards when the water is lower than the safe level. The ultra-fine mist will not wet the table, the open water tank top filling design makes it easier to refill and clean Kind ReminderOnly use mineral water or tap water. Do not use essential oils, perfume, distilled water, pure water, and hot water which may cause the cotton swab to clog and the humidifier to be unusable or cause water to accumulate in the mist outlet of the humidifier.