Cool Mist Ultrasonic Humidifier, Gutrader147 "No Noise" Minni Portable Air Humidifier for Travel, Baby Room, Home, Car, Face, Office + Water Bottle, USB Charging (Blue) Less than 15 db means that this humidifier is one of the most silences ever made. Extremely quiet operation. It is guaranteed to not disturb you through work or rest. No need to worry about add frequent water -- All Tanks, Bottles, Canisters, and other water containers are compatible, regardless of container's volume. Refresh the dry air to alleviate dry eyes and dry throat. It may also help with insomnia, cough, flu, cold symptoms, and cracked skin from lack of humidity. Super small humidifier covers up to 10-20sq.ft.of personal space without looking obtrusive. It's small enough to fit easily into a car. These smaller mist particles can moisturize your face. Just drop into any water source for instant relief from dry air! Quiet and travel sized for personal and portable use.