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. 1.Enjoy all night mist and rest easily. Perfect for your baby and a disturbance-free sleep at night. 2.Selecting the mist output conveniently for full control of the air you breathe. 3.You can enjoy whole night sleep, frees you from refilling water frequently. Having an automatic shut-off function, greatly ensure your safety and preventing unit damage when it runs out of water. 4.Cool Mist: Safely moisturizes the air for up to hours of continuous operation so you can breathe easy and get more restful sleep.