1) Copeland EVI compressor and Schneider electrical components. 2) Working ambient temperature down to -30 . 3) Automatically defrosting. 4) Intelligent controller and adjustment by microprocessor. 5) High efficiency tube in shell heat exchanger. 6) Easy installation and operation Opitional: * Galvanized metal cabinet stainless steel cabinet. * Refrigerant: R22 and R407C and R410a.