【1000ml Capacity & Unique Blue Light】Lasts up to 10-20 hours. meet daily water needs. Built-in blue light can reduce the growth of harmful impurities, purify water quality and maintain health. If you have any questions about this humidifier, please contact us directly. 【4 timers and silent】 The ultrasonic humidifier has 4 timer settings, long press the switch to choose the mode of spraying 1H, 3H, 5H or continuous. Noise canceling technology allows it to operate at less than 28 decibels without affecting your sleep and work. 【Built-in rechargeable battery】It takes 3-4 hours to charge. Dual spray mode can be used for 4 hours and single spray mode can be used for 8 hours. You can see the remaining power on the screen, which is convenient to use anytime, anywhere 【Auto shut-off and top filling design】This humidifier has 2 water level probes. built-in water switches, which automatically shut off when the water level drops below the safe water level to eliminate safety hazards. Ultra-fine