The 4-Ports IEEE 802.3at High Power over Ethernet Injector Hub (Part number: HPOE-460) from Planet is a Power over Ethernet (PoE). PoE (Power over Ethernet) products transmit both power and data across the internal cores of an Ethernet cable technology, enabling to get power to hard-to-reach areas. Nowadays they are an integral part of homes network setup, helping to remove the need of having other power cables since PoE devices are powered by ethernet cables.
4-Ports 802.3at 30W High Power over Ethernet Injector Hub - 120W External Power Adapter