This 5-Port 10/100/1000Mbps Gigabit Switch is a high performance auto-sensing switch that automatically negotiates between 10Base-T, 100Base-TX and 1000Base-T network speeds. All ports support full/half-duplex mode for maximum network performance. Designed and built to increase network bandwidth, this compact size switch is the best solution for both small business and home network environments. (plastic casing)