The POE injector supplies steady power and data connectivity to a powered device such as PoE IP camera, PoE AP and PoE IP phone through an Ethernet cable. when a network device without PoE function is used together with this product, it can be regarded as a power supply device as a whole. POE (Power over Ethernet) technology is the technology that provides direct current Power to some IP-based terminals while transmitting data signals. using this technology can greatly reduce the use of external power lines to reduce costs, that your network is normal and stable.