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.3-port auto-negotiating (no crossover cable required)10 / 100 / 1000 full duplexUSB or PS / 2 mouse-powered (no external power supply required)Link / status and connection speed LEDsLow powerRoHS compliant