The DIRECTV SWM ODU Power Inserter - PI21R1-03 is a unit designed for DIRECTV satellite systems. It has 2 inputs and is manufactured in China. As a power inserter, it is used to supply power to the Single Wire Multiswitch (SWM) system in order to distribute satellite signals to multiple receivers. This unit is essential for ensuring the proper functioning of the satellite signal distribution within a home or commercial setting.