The  PMBD3620 is a 2-port branch box up to 48,000 BTU for use in multi-zone mini split applications with LG's  LMU36,  LMU48,  LMU54, and  LMU60 outdoor condensers. It manages and distributes the flow of both refrigerant and power from the outdoor unit to all connected indoor units. With electronic LEVs, LG's branch boxes ensure optimal refrigerant flow and an accurate indoor unit temperature for your mini split indoor units.