Frontshield HD 1080P USB3.0 to HDMI Adapter Graphics Cable with Video Audio Multiple Monitors HDTV TV The USB to HDMI adapter connects a computer via USB to an HDTV, monitor, or projector with HDMI; Highest performance USB graphics solution available. This USB 3.0 to HDMI offer a high-definition graphic images to your HDTV or monitors at resolution up to 1920x1080, so the external video displaying problem of the computer will be solved easily. Only USB 3.0 connector can achieve HD 1080P, if you are usb 2.0 port, it just can be 800 x 600. Its great for connecting your computer PC to a projector to mirror or extend your display desktop when you are in a classroom or a conference room for showing a presentation. Please to contact our Customer Service Team, we will try our best to solve the problems.