The Ethernet power adapter is a way to both network devices and make them be powered by a single cable. In other words, its main function is that as long as there's an Ethernet network to transmit information over we can use this gizmo and send electrical juice (usually by Power over Ethernet POE) right down the line at the same time. This adapter comes with advanced technology: auto negotiation which automatically adjusts transmission speed according to what device it is connected to; and surge protection to protect devices from power fluctuations or overload before their lasting damage. The most likely combination on the market now—the 8-1 PoE 1-100M Ethernet Adapter Commonly used in systems such as IP cameras, wireless access points, and VoIP phones at places with very few power points, this makes the network and power supplies continue smoothly.