Color: GrayMaterial: Aluminum AlloyInterface: USB Type C Male PortPort-1: HDMI max support 4K 30Hz, downward compatible with 1080P, 720P, etc.Port-2: HDMI support max 4K 30Hz, downward compatible with 1080P, 720P, etc.Port-3: USB Type C PD Charging PortPort-4: USB 3.0, speed up to 5Gbps, power supply up to 5V-900mA 4.5W.Function-1: Connect keyboard, mouse, USB flash drive, printer, etc.Function-2: Support USB C power supply, keep computer laptop the best performance.Feature-3: Extend larger screen via HDMIFeature-4: Connect projector, monitor, HDTV, HDMI up to 4K 3840x2160 30HzFeature-5: 2 HDMI, support mirror mode and extend modeFeature-6: Support MST, support extend mode 2 monitors to display different contents under WindowsWindows laptops must require:The laptop's USB-C port must be a Thunderbolt-3 port.The USB port -C of the laptop is also an AC (power) port, or you do not want to power the laptop through this docking station.Warning message:< p>1. Determine if this docking station is compatible with your laptop.2. MST is only supported on Windows: extend 2 monitors to view differences.3. 4Kx2K@30Hz only supports one HDMI connection, the other HDMI is disconnected.4. When using the docking station to extend the monitor:Please connect the monitor first, then connect to your laptop.The HDMI hot plug n is not supported.Package List:1x HDD Docking StationRealize a simple life.