This product works awesome and easy to use app to download to your phone or tablet. Works in rooms small or big adds moister to the air, can be used all seasons. sigh of relief with the Levoit VeSync Classic 300S Ultrasonic Smart Humidifier. The 6-liter humidifier provides up to 60 hours of continuous mist, 4 mist level settings, aromatherapy, and an optional night light for your convenience.