The highly versatile Multi 21 plus systems, featuring GREE's G10 inverter-driven compressor and eco-friendly R410A refrigerant, are among the most innovative ductless split heat pumps available today. Our advanced G10 inverter technology gives you maximum efficiency to reduct your energy consumption. The slim compact design of the indoor unit hangs inconspicuously on the wall and mixes well with most interior designs. Built-in Wi-Fi technology allows local to long distance control from smart devices with the GREE+ smart app. A universal piping assembly/line-set (sold separately) is required for installation - be sure to select the appropriate size. Color: White.