POE Injectors, also known as Power over Ethernet injectors, are devices that enable network cables to transmit both data and electrical power simultaneously. They are commonly used in networking setups to power devices such as IP cameras, wireless access points, and VoIP phones without the need for separate power cables. POE Injectors typically come in compact designs and are easy to install, making them a convenient solution for delivering power to various network devices in both residential and commercial environments.