TP-LINK TL-SF1024D, Port-24, Protocols IEEE 802.3i, IEEE 802.3u, IEEE 802.3x, Interface 24 10/100Mbps RJ45 Ports (Auto Negotiation/Auto MDI/MDIX), Power External Power Adapter(Output: 9VDC/0.6A), Rack Mountable, Max Power Consumption 3.19W(220V/50Hz), Max Heat Dissipation 10.88BTU/h, Capacity 4.8Gbps, Packet Forwarding Rate 3.57Mpps, Buffer Memory 2Mb. The 24-Port 10/100Mbps Switch TL-SF1024D provides you with a high-performance, low-cost, easy-to-use, seamless and standard upgrade to improve old network to 100Mbps network. All 24 ports support auto MDI/MDIX, no need to worry about.