The Usb-c to 4-port Hdmi Multi-Monitor Adapter functions as an external video card for your MacBook or personal computer. It allows you to add four additional monitors/displays through your Usb-c port. This is the perfect alternative to a costly video card. With the JCA366, you can quickly install the driver with a simple Usb-c plug-in. Afterwards, connect your device to your monitors using Hdmi cables and you have just created a new visual environment in seconds.