Hello friends, my self rohtas kumar and I have been used of this product from 1 year. In begining, it had given best result and no any sound problem, but after one year, its cooling was going down and the main issue of its gas leakage. And after a few days, it had make a bad noise or sound. Service charges was so high and Price was so high and its feature was not matched at this price rate. So, I am not satisfied to buy this product