Easy operation -Humidifiers portable have 2 speed options; cup design perfect for most car cup holders (package only includes USB cable, does not include any adapter) 250ml container with 2 spray modes: If there is enough water, you can spray 6-8hours , intermittent spray Anhydrous power off: When the water level is lower than the contact pilotage the spraying mode is shut.Spraying operation: Humidifiers for bedroom click button start to continue the spraying mode;Click it again to start the intermittent spray mode ( 3 seconds on, stop 3 seconds)Night light operation: Press button for a long time to start the gradual-change mode of the night light; for the second time, the color mode is set for the press for a long time for the second time; night light mode is shut for the third time long press.Lightweight and easy to carry : Car humidifier USB powered and size 70 * 70 * 149mm makes it easy to carry, whether from home to office or car.Working efficiency: 250ml volume, 35ml / h spray volume.Ultrasonic Operation and Ultra-silence Design: Office humidifier humidify your living space to prevent dry, stuffy air prevent dry and chapped skin in dry seasons with no noise.Perfect mist cool humidifier for any small area, such as cars, work benches, bedrooms, pet rooms, etc.Recommend In order to have a good spray effect and the service life of mist cool humidifier, we suggest using tap water, and do not recommend distilled water.