siig s usb 3.0 to hdmi/dvi dual display adapter allows you to add one hdmi and one dvi port simultaneously to your windows or mac computers through a usb (3.0) port. it supports triple display modes including primary, mirror and extended to enable a wide variety of applications, great for presentation or entertainment. superspeed usb 3.0 5gbps data transfer rate and full hd resolution are supported to smoothly deliver high-resolution crystal clear images/videos. it is quick and easy to setup with no external power adapter required. this high performance dual display adapter greatly expands and enhances your computer s display capability for a much improved efficient and productive system. features: easily adds an hdmi and dvi port simultaneously to windows or mac computers through a usb (3.0) port superspeed usb 3.0 5gbps data transfer rate supports crystal clear and smooth high-resolution video/images triple display modes (primary, mirror, extended) support a wide variety of applications such as presentation or entertainment, great add-on solution for increasing productivity delivers 5.1 channel surround sound audio through hdmi output supports high resolution up to 1920x1080p (full hd) and 2048x1152 quick and easy installation with no external power adapter required specifications compliant with universal serial bus 3.0 specification compatible with both standard (4:3) and widescreen (16:9 and 16:10) aspect ratios automatically detects the connected displays using vesa compliant protocols allows connecting up to 3 adapters and up to 6 monitors per system