This is a car and USB humidifier Feature Anion generator Humidifying function Aroma Oil useable with the absorbent stick for natural perfume. Ultrasonic cool mist technology. Whisper quiet operation. Can be used for can or computer by different connect wire. Specification Coverage10m2Voltage/powerDC 5V(USB) DC 12V(Car) / <2.0WNegative Ion density>3.0*106pcs/cm3Humidification50ml/hourNet ...