> 12-watt micro USB Power over Ethernet PoE up to Remote 328-492ft (100-150m) via Ethernet cable, 802.3af PoE switch or 48v injector is needed >Power Output Port: 5V 2.4A Micro USB Power Plug >Compatible with 44-57V DC voltage, overvoltage protection >Support IEEE 820.3af PoE Switch, 48V Unsolicited Power Over Ethernet PoE Switch or Ethernet PoE Adapter, 48v injector. For gigabit PoE switch users, gigabit splitter U515902 is recommended