3.3L White Air Humidifier Ultrasonic Cool MistSANSAI Air Humidifier Ultrasonic Cool Mist 3. 3L White For almost 30 years, SANSAI has been providing various exclusive products including humidifiers. Its ultrasonic cool mist increases air moisture for easier breathing and a good nights sleep as it is made quiet and able to circulate air in rooms up to 30sqm. The humidifiers relieve cough, cold, and flu symptoms, nasal congestion, dry cough, sinus irritation, nose bleeds, and dry skin and hair.