Usha Maxx Air 50MD1 50-Litre Desert Cooler (White/Black) has a smart sheild technology which makes the water tank resistant to bacteria and fungal growth. It has a smart sleep function which reduces the speed over a period of time, child lock and memory mode to store your desired combination of pump, swing and fan. Most importantly it has a low water alarm which tells you whenever the water level is low in your cooler.
Demo and installation are not required for a cooler. Still in case you face any issue in understanding the functions then please refer to the manual or contact us at 011-40239900/ 9718515202 or on the number mentioned by the brand on the manual.