The J5create JUA254 USB to HDMI Multi-Monitor Adapter works as an external video card, instantly allowing users to attach additional displays via HDMI connection without the hassle of a lengthy setup or having to install additional hardware. The USB 3.0 Display Adapter can support up to four displays running on the same computer, turning your workstation into a fully-functioning, multi-display powerhouse. This USB adapter works as an external video card, instantly allowing additional displays without the hassle of opening the computer casing and installing an external graphics card.