It is a huge sound maker which suffered our family to feel headache. When my father purchased it we felt that their is a small sound coming from the cooler. Then that seller said that it is just a motor sound which will be control in future.
But it not worked properly even for 6 months. Slowly the parts of the cooler were started damaging one by one. After somedays we found that the motor was damaged and use sound is started from it.
We spent many nights without sleeping because of this cooler. So, don, t buy this cooler and face problems like us.