Sleep in total silence. No need to tolerate hums and whistles. The peaceful sleeping atmosphere for you.and safely every night thanks to the auto-shut off feature and nearly silent operation. The humidifier with 14.5L large water tank that keeps the room humidifier working 15-30 hours, You don’t need to add water to humidifier multiple times! The humidifier’s built-in humidity sensor automatically adjusts the mist level to maintain a comfortable level of humidity, so you can set it and forget it. Humidifier will automatically shut off when runs out of water. Don't worry about dry running when you are sleeping, since its auto-off feature will provide better protection for you. 12-hour timer function. Adjust settings in the middle of the night without leaving the comfort of your bed. On a schedule. Set a timer so you won’t have to worry about accidentally leaving the humidifier on.