GEU-0521 4 GE + 1 GE SFP Switch 4-port 10/100/1000Mbps copper and 1-slot Gigabit SFP fiber Palm size with metal case Auto-learn of networking configurations Auto-detect full/half-duplex mode for each port Dedicated full-duplex 2000Mbps bandwidth for each port Store-and-Forward switching method IEEE 802.3x flow control for full-duplex and backpressure flow control for half-duplex Non-blocking & Non-head-of-line blocking full wire speed forwarding Auto-MDI/MDI-X function for each copper port Smart plug & play LevelOne GEU-0521 is 5-port SOHO Gigabit Ethernet Switch that is designed for small or medium network environment to strengthen its network connection. This product is compact in size, making it ideal for SOHO users with limited space. This product is easy to install. It is a superb choice for expanding your network.