4 of the 5 Auto-Negotiation RJ45 ports (Port 1 to Port 4) of the switch support Power over Ethernet (PoE) function. These PoE ports can automatically detect and supply power with those IEEE 802.3af compliant Powered Devices (PDs). Intelligent Power Management When total power consumption excels 55W, the intelligent power management will cut the lower priority port power off to ensure the high priority port’s power supply and protect the device from power overload operation. Features: 8 10/100/1000Mbps RJ45 ports With four PoE ports, transfers data and power on one single cable Working with IEEE 802.3af compliant PDs, expands home and office network Requires no configuration and installation 802.1p/DSCP QoS enable smooth latency-sensitive traffic PoE power up to 15.4W for each PoE port PoE power up to 55W for all PoE outputs