The GREE Rio High-Efficiency Ductless Mini-Split Heat Pump system is compact, quiet & provides unmatched comfort in any room. Without needing ductwork, installation is simple, fast & cost effective. In addition The GREE Rio provides quiet comfort & improve defficiency by eliminating heat loss inefficiencies of conventional central air conditioning systems. Features & Benefits : High-Efficiency Inverter Technology, Eco-friendly R410A Refrigerant, Low Voltage Start-Up, Intelligent Defrost, Intelligent Pre-Heating, Comfortable Sleep Mode, Auto Swing (Vertical), Four Fan Speeds, Auto Clean, DryAnti-Mildew Design, LED Display, Automatic Operation, Self-Diagnosis, Timer, Control Lock, Stylish Compact Design.