Hello guys myself ghanshyam Singh The biggest problem in this air cooler is that it does not cool down, it has very small cooling capacity and can be useful only for small rooms. But its sounds are very disturbing and I believe that you can not sleep in this sound, so I think this is a very bad thing of the cooler so please make sure that its voice is okay for you before purchasing or No, because this is very bad for me. I think you should pay attention to other products besides this