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 air humidifier with 2200ml large water tank and double nozzles that keeps the room humidifier working over 20 hours on a single fill, You don't need to add water to humidifier multiple times! Change the water once a day can reduce the growth of impurity and maintain health.You can choose the appropriate spraying mode according to your environment and space. This cool mist humidifier has two modes: continuous mode and intermittent mode. It can operate up to 20 hours with dual-mist continuous spray mode, and up to 30 hours with one-mist intermittent mode. 7-colorful soft night light could create a sweet and romantic sleeping atmosphere, improve your sleep quality!