Voltas air coolers are the best among other competitiors as they know how to cool in hot and sunny weather.it is totally portable easy to carry from one room to other and very light in weight.its cooling is very very good without much noise of the machine and easily surrounds the room with cool air for everyone and it can be used continously for long hours upto 8 to 9 hrs without any sort of mechanical problems.it is a great value for money product with all the best features given.