ThinkPad OneLink Pro Dock delivers data driver-free dual video and power through a single convenient connector; Unlike USB docks the Onelink Pro Dock delivers video with no compression no drivers and no impact on image quality and notebook performance; Power button on dock mirrors system power button; Available ports: Front Panel - 2x USB 3.0 (One with Always-On Mobile Device Charging) - Ideal for use with memory keys hard drives and other quick access devices Stereo / Mic Combo Audio Port; Available ports: Rear Panel - 2x USB 2.0 - Ideal for most USB devices including printers keyboards and mice 2x USB 3.0 - great for backup hard drives and other high speed USB accessories which you usually leave at your desk DisplayPort with maximum resolution 2560x1600* DVI-I with maximum 1920x1200 resolution and DVI to VGA adapter included in the box Gigabit Ethernet (10/1000) with Boot over LAN support on selected systems DC In; Cable lock slot for physical security on the side of the ThinkPad OneLink dock; Includes 90W AC adapter (slim tip) to support charging your notebook; Full Dual video output is supported on ThinkPads with DisplayPort 1.2. ThinkPads with DisplayPort 1.1(ThinkPad Edge E431/E531/S431/S531) have some limitations with video output configurations.