Hello friends, I want to say something to you about USSA air cooler.actually I used this product, when I bought this product, i fill so happy. This product is very good. Its cooling system is best when water mode switch is on but watter mode switch is off generally like stand fan.if it running in the room and every door and window close, you fill hot air but when it out of the door and start it , you fill cooling the air.overall price rate not bed compair to the product and it also connect invetor.this is the best solution for all customer.