Features: Model S1500C-4ET2ET Hardware Ethernet Port 4*10/100Mbps PoE ports Power DC48~57V power adapter Dimension(W×D×H) 130mm×85mm×26mm Working Temperature -10°C~+55°C Application Humidity 10%~90% Performance MAC Table Size 2K Switching Capacity 1.8Gbps Packet Forwarding Rate 768Kb Packet Buffer Memory 890kpps Remote mode Supports 250m long distance power transmission Flow Control Enable by default Lightning Protection Common Mode 2KV Differential Mode 0.5KV POE PoE Protocol IEEE802.3af (PoE), IEEE802.3at (PoE+), Hi-PoE PoE Power Consumption Port1≤60W, Port2-4≤30W, Total≤60W