This 2.0 tonne cooling capacity wall mounted split air conditioner has a rotary compressor and 3.17 EER. It has anti-corrosive-blue fin copper condenser and has the following features like auto restart with memory backup, timer, sleep mode, anti-freeze thermostat and self diagnosis. The noise levels are 47db and power consumption is 1910 watts. I recently bought this, and its very efficient. Price is also good. You can have a look.