NEEWER 4 port POE power over ethernet injector for IP Camera, Access Points This Power over Ethernet module allows you to power up to 4 devices remotely over ethernet wiring up to 328 ft (100 meters) away Add PoE ability to any Ethernet switch or router. Use this device to inject power into the CAT-5, CAT-6 or CAT-7 cable. Standard Ethernet uses 2 of the 4 pairs, passive POE uses unused pins 4/5 for plus power, and 7/8 for ground. For Many popular devices like IP Cameras, IP Phones, WiFi Access Points and more Connect the power supply you need (48v for phones, most cameras, 24v for Ubiquiti or Mikrotik, 18v for Tranzeo or OpenMesh, 12v for other devices) and reduce the mess of cables. Reboot all 4 devices from one central location. We use these in our own installations and are making them available for others.