Description Lenovo 40A20090US ThinkPad Ultra Dock FRU 04W3956 SD20A06046 90W Type 40A2 Docking Station Keys are NOT included and not needed for the dock to work. Unlocked AC adapter is not included. Compatible System: (Dual Core with Integrated Graphics ONLY) ThinkPad X240, X250, T440, T440p, T440s, T450, T450s, T450p, T460, T460p, T470, T470s, T540, T540P, L440, L540, W540, W541, P50, P50s, P51, P51s Compatible part numbers: 04W3951, 04W3956, 00HM917, 04W3947, SD20A06041, SD20F82750, 40A20090US Features • 3 x USB 2.0 and 3 x USB 3.0 with one always-on to charge mobile devices • 10/1000 Gigabit Ethernet supporting enterprise manageability features • Supports up to 3 external monitors • Security lock slot to secure laptop and dock with a single key • Convenient eject button for one-step notebook removal Specifications: Video Ports: • 2 x DisplayPort 1.2 • 1 x HDMI 1.4 • 1 x DVI-D • 1 x VGA USB Ports: • 3 x USB 3.0 • 3 x USB 2.0 (1 always-on) Audio Ports: • 1 x 3.5 mm Stereo/Mic Combo Port Networking Port: • 1 x Gigabit Ethernet Port Physical Security: • Kensington security lock slot Max Number of External Monitors: • 3 Maximum Resolution/Refresh Rate: • DisplayPort 1 or HDMI: 3840 x 2160 @ 30 Hz • DisplayPort 2: 3840 x 2160 @ 30 Hz or DVI: 1920 x 1200 @ 60 Hz • VGA: 1920 x 1200 @ 60 Hz