The Daizuki Inverter Mini-Split has 18,000 BTU in cooling & heating capacity and 20 SEER efficiency. It works with a power supply source of 208-230V/1Ph/60Hz and is pre-charged with R410A refrigerant which does not contribute to ozone depletion. This equipment includes Blue Fin technology to provide protection against corrosion in environments where traditional coil coatings fail. It has Full Inverter Technology which makes the A/C units quieter and consumes less energy in comparison to other technologies. In addition, this product is AHRI approved and certified with the ETL Mark, to bring you peace of mind about the product quality. Thanks to its WiFi Technology, you can connect your mobile terminals such as smartphones and tablets, through the internet to your Mini-split and control it wherever. To facilitate installation, this Mini-Split includes a Full Installation Kit, which includes the condenser and evaporator units, a control remote, interconnection cables, and enough copper connecting pipes for a standard installation. Winter-Proof. This mini-split can operate at full capacity in outdoor temperatures as low as 20°F/-6.7°C and can operate at half capacity in outdoor temperatures as low as -13°F/-25°C.