Displays the same Image on 4 HDMI monitors, Extends the desktop across all four, or combines all into one large monitor Supports UHD video resolutions up to 3840 x 2160 (4K x 2K) Supports DTS-HD, Dolby TrueHD and 7.1-Channel surround Sound Works with all operating systems. Built-in 6 inch cable connects directly to Mini DisplayPort source AC Adapter- Input 100-240V, 50/60Hz, 0.5A. Output- 5V, 2A, 5 feet 3-year limited warranty