[Aromatherapy humidifier for car and office]: the mini aromatherapy humidifier with ultrasonic uses ultrasonic vibrations to generate mist in the air. It prevents throat and skin irritation caused by dryness. Perfect for fall and winter. You can add a few drops of your favorite aromatic oil to enjoy the sweet fragrance and moisture. in your car or office. [Up to 16 Hours & Auto Safety Shut-Off Feature]: Once filled with 100ml (3.4 fl. oz) of water, this mini oil diffuser can be used anywhere. continuously for about 8 hours with default low haze and 6 hours with high haze. In 10-second interval mode, it can be used in a light fog until 16 hours. It will automatically shut off when the water runs out. You don't have to worry about forgetting to turn off the power overnight. [Quiet USB Power Supply]: Perfect for travel, office or car. The included USB cable allows you to easily connect to your car, PC or power bank for maximum convenience. You can use it without worrying about noise