Voltas is a largest air conditioning company.this 1.5 ton air conditioner with a rotary compressor has an energy efficiency ratio os 9.57. it has digital temperature control led indicators on display panel lcd remote control which is bast part of this air conditioner.noise level of this AC is 56 db.i was install this air conditioner 4 month ago and I have dont have any issue with this air conditioner .this is not so much crossly that’s way I like this air conditioner.