The JUA354 USB™ 3.0 to 4K HDMI™ Display Adapter acts as an external video card for your MacBook® or Windows® computers. It allows you to add an Ultra HD 4K display through your USB™ 3.0 port, boosting your productivity by giving you more screen space to work from. This is the perfect alternative to a costly video card. With this USB™ 3.0 Multi-Monitor Adapter, you can quickly install the driver with a simple USB™ plug-in. Afterwards, connect the device to your monitors using a HDMI™ cable and enjoy the picture quality of Ultra HD video!_x000D__x000D_The adapter supports three viewing modes. Primary Mode allows you to have individual applications open on each monitor, vastly improving productivity. Extended Mode allows you to extend your desktop across multiple displays, which is great for office applications. Mirroring Mode is used to clone one screen onto another, which is ideal for presentations. With plug-and-play functionality between your computer and second monitor or projector, you will be able to create a new visual environment in seconds.