Nanum II Car Humidifier with Dual USB Charger, 4 in 1 Essential Oil Aroma Diffuser, Car charger, Portable Ultrasonic Mini Cool Mist Aroma Humidifier, Air Purify with Auto Off (Dual USB, Purple) 4 in 1: Car Humidifier + Car Aroma Diffuser + Air Purify + Dual USB Charger Improve the Air Quality: This humidifier provide a cool mist and adding moisture to the air, also effectively eliminates dryness, helps with dry chapped skin, lips, sinuses, and coughs. Be mixed with the essential oil together to make your car with full aroma. Ultrasonic Atomization Technology: 113KHz Frequency makes water into 6um super small drops,and make More uniform diffusion of essential oils. EASY TO USE: Standard Car Charger Interface, just plug directly into the 12V cigarette outlet. Humidifier Water Tank Could be 180-Degree Rotation with No Leakage. 50ml Humidifying Capacity per Hour: It's Enough to Change the Car Microenvironment and Meet Your Needs. The 2-hour Automatic Shut-off Prevents Potential Harm from Running without water.