1,humidify,2, purify the air,3,provides additional comfort to dry itchy skin 4, Ultrasonic,5, cool moisture Ultrasonic Humidifier has the blow feature: 1,it can be used in house, car and office. 2,Anion purify the air, cool moisture and dislodge formaldehyde, carbon monoxide etc chemical material. 3,Put in aromatherapy essential oil, creat the fragrance and comfort environment, 4,Put in repellent ...