The 5.5 to 3.5mm jumper cable connects the low voltage power cable for TRENDnet power over Ethernet (PoE) splitters to devices with 3.5mm power ports.Connect TRENDnet's gigabit power over Ethernet splitter or power over Ethernet splitter to the wired or wireless pan/tilt Internet camera server, the wired or wireless day/night pan/tilt Internet camera server with 2-way audio and to other devices with a 3.5mm low voltage power port.