Lenovo ThinkPad Hybrid USB-C with USB-A Dock, I/O Ports: 1x USB-C (Data, 5V/3A power), 3x USB 3.1 Gen2 (10 Gbps, 1 always-on), 2x USB 2.0, Video Ports: 2x DisplayPort 1.2, 2x HDMI, 1x 3.5 mm Stereo/Mic Combo Port, Max Number of External Monitors 2, Maximum Resolution/Refresh Rate: DisplayPort: 3840 x 2160 @ 60 Hz, HDMI: 3840 x 2160 @ 60 Hz, Bundle DisplayPort 1 & DisplayPort 2 to the monitor: 5120 x 2880 @ 60 Hz, (Maximum resolution refers to what can be supported by the dock. Actual resolution will vary by laptop), Output Power: 90W, Input Power: 135W, Enterprise-class capabilities with PXE boot, Wake-On-Lan, and MAC address pass-through, Warranty Period: 3 Years