The DS-3E0105P-E is a 10/100 Mbps unmanaged switch that requires no configuration and provides four PoE (Power over Ethernet) ports. It can automatically detect and supply power to all IEEE 802.3af/at compliant powered devices. In these situations, electrical power is transmitted alongside data in one single cable, allowing network expansion where there are no power lines or outlets, for devices such as IP cameras, IP phones, etc