[1000ml capacity and unique blue light] can last up to 10-20 hours. Meet daily drinking 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 mute] Ultrasonic humidifier has 4 timing settings, long press the switch to choose 1H, 3H, 5H or continuous spray mode. Noise reduction technology makes it run below 28 decibels and will not affect your sleep and work. [Built-in 2400mAh battery] It takes 3-4 hours to charge. The dual spray mode can be used for 4 hours, and the single spray mode can be used for 8 hours. You can see the remaining battery power on the screen for convenient use anytime, anywhere [Auto-closing and top-filling design] This humidifier has 2 built-in water level probes. When the water is below a safe level, it will automatically shut down to eliminate potential safety hazards. The superfine spray will not wet the table, and the topfilling design of the open water tank makes it easier to refill and clean [Reminder] Only use mineral water or tap water. Do not use essential oils, perfumes, distilled water, purified water, and hot water, which may cause clogging of the cotton swab and unusable humidifier or cause moisture to accumulate in the spray outletof the humidifier.