Color: Gray Material: Aluminum Alloy Interface: USB Type C Male Port Port-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 Port Port-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 HDMI Feature-4: Connect projector, monitor, HDTV, HDMI up to 4K 3840x2160 30Hz Feature-5: 2 HDMI, support mirror mode and extend mode Feature-6: Support MST, support extend mode 2 monitors to display different contents under Windows Windows 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: 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 Station Realize a simple life.