Dimensions 48 cm x 92 cm x 134 cm weight 480g compatible with thinkpad e440 e540 thinkpad edge e431 e531 thinkpad s431 s440 s531 s540 x1 carbon 20a7 20a8 2nd and 3rd gen interfaces 4 x superspeed usb 30 1 x headset headphones microphone 2 x usb 20 4 pin usb type a 1 x audio video displayport 20 pin displayport 1 x audio video dvi analogdigital dual link 29 pin combined dvi 1 x network 10base t100base tx1000base t rj 45 1 x docking port replicator po