Laptop docking station external interfaces lan rj45 usb 20 video output vga usb 20 ports 1 compatible with lenovo thinkpad l412 lenovo thinkpad l420 lenovo thinkpad l512 lenovo thinkpad l520 lenovo thinkpad t400s lenovo thinkpad t410si lenovo thinkpad t410 lenovo thinkpad t410s lenovo thinkpad t510 lenovo thinkpad t410i lenovo thinkpad t420s lenovo thinkpad t510i lenovo thinkpad t520 lenovo thinkpad t420 lenovo thinkpad x220