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 / 60Hz