The CyberData 3-Port Gigabit Ethernet Switch enables users of a PC to split a single Gigabit Ethernet port into two Gigabit Ethernet ports. The CyberData 3-Port Gigabit Ethernet Switch enables users of a PC to split a single Gigabit Ethernet port into two Gigabit Ethernet ports. The power for the switch is supplied by the PC's USB port. Features - 3-port auto-negotiating (no crossover cable required) - 10/100/1000 full duplex - USB or PS/2 mouse-powered (no external power supply required) - Link/Status and connection speed LEDs - Low Power - RoHS Compliant