Warm Night Light Mode: Long press the power button to turn on/off the night light, and the soft warm light creates a soothing atmosphere; it can be used in single night light mode or with humidifier spray mode at the same time; The working indicator light is always on. It has a low-brightness night light and real-time working status function at night (cannot be turned off)Note: Please use clean water, do not use distilled water, perfume, essential oils and other liquids. When using for the first time, please fully submerge the filter swab for about 30 seconds to ensure that the filter swab absorbs enough water. Do not invert or tilt the water tank after filling it with water to prevent water from seeping into the cabin from the nozzle and damaging the humidifier or water from seeping out of the nozzleWater Lack Protection: Built-in water level sensor safety feature automatically shuts off the device when the water level is low to prevent damage. And the seal is strong,no longer afraid of pouring liquid to leak in accidenceCompact Design: This portable humidifier features a sleek, cylindrical shape perfect for small spaces like bedrooms, offices, and cars. The portable USB humidifier is very easy to operate. One-touch control of all functions, just press a button to set the mistDual Nozzle: This mini humidifier has 2 modes. The dual nozzle design allows for wide mist dispersion, efficiently humidifying the surrounding area. When you press the button for the first time, it will spray continuously in 2 nozzles. When you press the button again, it will spray alternately (3 seconds each), and when you short press the button for the third time, the spray is turned off