WT-GPOE-4 gigabit Poe Injector for 802.3af Devices - 4 Port Power Over Ethernet Wall Mount with Shielded RJ45 - Power Supplies Available Separately Gigabit Power over Ethernet injector, wall mount, 4 pairs of ports, shielded RJ45 in and out Power IP Phones, Access Points and IP Cameras that use gigabit or 10/100 Ethernet Power 802.3af devices (power on all the time) - power shared between all ports - 48 volt power supply required (NOT INCLUDED) see our kits with power supplies Mode A PoE (pins 1,2 & 3,6) from from 48 to 56 volts, reversable polarity, with polarity indicator ( See our mode B devices for 24 volt systems) Expert, USA Tech support - ask if you have any questions call +1 512 479 0317