This Stonet ST3105C Fast Ethernet Switch provides an easy way to expand your wired network with 5 10/100Mbps Auto-Negotiation RJ45 ports. All ports support Auto MDI/MDIX function, eliminating the need for crossover cables or uplink ports. Together with the plug-and-play & Green Power feature, it may ensure you a low-cost, easy-to-use, high-performance, seamless and standard upgrade to improve your network to a 100Mbps network.5*10/100Mbps Auto-Negotiation RJ45 ports, supports auto MDI/MDIX Green Ethernet technology saves the power up to 70% IEEE 802.3x flow control provides reliable data transfer Plastic case, desktop or wall-mounting design better for home and office use Plug and play, no configuration required