Our Macbook Docking Station supports 4K at 60 Hz.
1. Connect Type C USB cable to your laptop and Host 2.
2. Connect DC power supply
3. Connect your 4K 60Hz compatible display to the HDMI3 port on the MacBook pro dock.
Both Extend and Mirror modes are supported.
How to use all 15 ports?

To use all the ports on the MacBook dock you need to:
1. Connect BOTH Host 1 and Host 2 to your laptop(s)
2. Connect the USB dock to the DC power supply.
3. Use a USB C, Thunderbolt DP 1.4 (1.2) compatible device.
2. How to connect maximum numbers of displays?
If your device supports DP 1.4 and does not have an Intel graphic card (AMD graphic cards preferred) you can:

1. Connect laptop 1 to Host 1
2. Connect laptop 2 to Host 2
3. Connect 3 HDMI displays to HDMI1.2.3
4. Connect a VGA display to the VGA port
Including the two laptop displays, you will have SIX displays in total. (If more than 1 HDMI is connected max output will be 4K at 30Hz, if VGA is connected all ports resolution is limited to 1920*1080 at 60Hz)