The HDPIMF HDMI® Power Inserter is a device designed to power both sides (2-way) of an HDMI circuit. This short adapter with a power jack and included USB power supply and cable is ideal to insert power into the HDMI circuit at a panel or plate junction. This unit is a male to female 2-way adapter. The typical use pattern for this product is plugging into a passive coupler, such as a panel mount junction. Then the cable needing power is plugged into this unit. This unit can be plugged into the front or the back of a plate coupler, it does send power both ways to power both active cables in the circuit.