1Rapid Humidification: Mini humidifier adopts micron sized ultrasonic atomizer, which can generate enough cold mist in a short time, and can achieve ideal humidification effect in just a few minutes. 2Two Spray Modes: Portable mini humidifier can be set to single port or double port spray mode by switch, with single port spray lasting for 6 hours and double port spray lasting for 3 hours. 4280ml Capacity: Small humidifier has a 280ml capacity water tank, which can be used for a long time, avoiding frequent water addition, and is very suitable for use in baby rooms, bedrooms, offices, etc. 5Compact Portable: Desktop humidifier is compact in structure, small in size, light in weight, and convenient to carry and use when placed on the table. 310dB Noise: USB humidifier has a noise of 10dB when working, which will not disturb your work or sleep, and it has a night light and soft light to accompany you to sleep all night.