Lenovo Thinkpad Usb 3.0 Ultra Dock (40A80045US) 4 x SuperSpeed USB 3.0, 2 x USB 2.0, 1 x HDMI, 1 x Video Display Port, 1 x RJ-45 Supports screen replication for up to two external monitors. Includes 45W Power Adapter (does not power or charge attached laptop) Driver Update Required For Optimal Functionality IMPORTANT - Full Compatibility List in DESCRIPTION