Haier Innovative Design and Technology provides what you paid for. Full BTU even at 46°c hot outdoor ambient ensures full cooling capacity of the BTU rating mentioned on the product without any loss of cooling efficiency. You can enjoy the comfort even if there is no electricity. Air Conditioner* can work on UPS in case of power outages, a small device enables Haier Air Conditioners to work on your Existing Home UPS*, if it has Minimum 500 watts of vacant load, it will give you 3-4 hours backup time. (depends upon the health of the battery) * UPS Module Device is mandatory to operate the AC on UPS.