very quiet i am using it for my desk but i realised having this made me sneeze alot so much sometimes i need to turn it off 600 ml is good but i realised it too small for me i alteast need something like 2 litters and i wish it could humidify my entire room but this is what it is and i am happy that is is silent but i do notice the noise it makes while sleeping but silent enough for me to sleep and tune the noise out which is okay my only grip about humidifiers in general needs cotton swab which needs to replace which i dont like but maybe there might be a humidifier that does not need a cotton swab just a relief. but all in all this is a very good quality build like it is soo good that i am bafield about there quality it just high quality even the button feels it going to last me a life time i wish this was battery powered rather than i have to pulg in the micro B usb so i can have the humidifier working but for the price i am willing to deal with it.
Nice thing to have. I have had very dry nose. I even suffered from nose bleed after waking up in the morning. Using a humidifier cured that problem. I literally cannot think of a life without this. Very glad that I purchased it