Usb docking station external interface lan rj45 lan standard gigabit ethernet 101001000 mbits compatible with lenovo thinkpad l440 lenovo thinkpad l450 lenovo thinkpad l540 lenovo thinkpad t431s lenovo thinkpad t440 lenovo thinkpad t440p lenovo thinkpad t440s lenovo thinkpad t450 lenovo thinkpad t450s lenovo thinkpad t540p lenovo thinkpad t550 lenovo thinkpad x140e lenovo thinkpad x230s lenovo thinkpad x240 lenovo thinkpad x240s lenovo thinkpad x250