Personal care diffuser: humidifier will produce ultra small water drops and a large amount of oxygen ions into the air around you, which can absorb and take away dust and unhealthy items around you, and purify the air to make you feel happy, clean and happy driving experience! 7 colors LED night light/car humidifier: 7 colors LED night light will give you more choice to find your favorite color. Just plug it into the car's USB port, it can purify the air inside the car and prevent static electricity and dust, reliving dry nose and throat. You can take it for business trips and travels. Two mode: This mini USB humidifier has two modes. The first mode, you need to press once, will continue to spray for 4.5 hours. The second mode, you need to press again, it will spray (stop for 3 seconds) for 9 hours. Silent operation/USB power: With sound-free design, it only creates sound less than 35 dB which is very quiet, giving you a perfect sleep. You can even use it with children and pets at home. With the USB power port, you can charge it with computers and mobile phone. Fits perfectly in car cup holder: The essential oil car diffuser can be fit firmly in the car cup holder, no water leakage during drive, and its space-saving size is pefect on travel, your office or home desk.