Features: Remove unfavorable odors and smells. It can increase humidity of air, reducing dust and bacteria. 180 degree rotation to make full humidification. Lightweight mini design, very easy to use, powered by DC 12V vehicle power supply. You can drop the aroma oil(not include) into the water to make the air fresher. Auto-off after 2 hours for safe use. Perfectly applicable in the car, enjoy the fresh air on the road!