(When your first time use, please add full water then put it upside down in 10 sec. to let it faster absorb enough water.) >>Support Essential Oil: This car humidifier aroma diffuser will support oils to make your car smell sweet(No adapter included, only USB cable). >>For Car/Travel/Home/Office: Portable and fit for car cup holder, USB powered, specially car interior, let you drive in fresh, sweet and invigorating surroundings. Also designed for home and office, put it on your desk, powered from computer ports, cellphone charger or power bank. >>Rich Work Modes: Touch the switch 1st time for continuous work mode with LED light in 3 hours, 2nd time for intermittent work mode with LED in 7 hours, 3rd time for continuous work without LED in 5 hours, keep touch to turn off. >>USB Power, Colorful Light and Auto stop: USB for easier operation and faster power source, auto stop for worry-free , LED light will auto change colors and you can let it work without LED light.