QUIET OPERATIONThe usb personal humidifier produces a near-silent frequency 26dB ensuring quiet operation.This desk humidifier won’t bother you while sleeping and working. EASY TO USEThe personal humidifier is equipped with a one-touch control, making it easy to operate and user-friendly. To open the humidifier, simply rotate it counterclockwise. This design ensures ease of cleaning and maintenance. NOTE: IT IS RECOMMENDED TO USE TAP WATER. DO NOT USE BOTTLED OR DISTILLED WATER. AUTO SHUT-Off NIGHT LIGHTWhen the water level of the water tank is lower than the water level probe in the water tank, all spray modes will be automatically turned off to eliminate safety hazards. There are two modes of night light function, constant light mode breathing light mode, you can adjust according to your favorite. TWO MIST MODESThis small humidifier has two modes: continuous spray intermittent spray. You can adjust the spray amount as needed. It can effectively moisturize dry skin and help you reduce skin peeling or relief from sinus issues. PORTABLE COMPACTThe mini humidifier is portable and small(3.4 5.9inch) which is very easy to take with you anywhere and super perfect for travel, bedroom, office. NOTE: The humidifier can not be placed on the cup holder in a car.