WS-POE-12-1U passive 12 Port Power over Ethernet Injector POE - power supply available separately Power over Ethernet injector, 1U rack mount, high power POE, 10/100 speeds IP Phones, Access Points and IP Cameras with 802.3af - use a 48 volt supply ( not included) Use a 24 volt supply ( not included) for OpenMesh, Ubiquiti, Tranzeo passive PoE Click on "WiFi-Texas com inc" to see versions including power supplies Expert, USA Tech support - ask if you have any questions call +1 512 479 0317