The j5 create Video over USB adapter(JUA230) works as an external video card allowing the addition of another DVI display through a USB port. Supporting widescreen resolutions and three different displays modes, your options are endless. Increase productivity by working with different applications on multiple displays without overlapping. Extend your desktop across multiple displays or select Mirror Mode to clone one screen onto another. Ideal for business applications. With Wndows add up to 4 additional monitors, with MAC add up to 2 additional monitors. If you want 1080p HD video play back look for our new USB 3.0 adapters. JUA310, JUA350.