A de facto industry standard for driving a 2x2 video wall, also used in live production to drive multiple displays from a single output - this one has spent its life in theatres allowing us to send 4x HD outputs from one monitor output on a QLab Mac mini although if you’re looking at this device you probably know what it is! Can also be used to drive four monitors from one computer, eg for simulations or just large workspaces. Selling as have upgraded to 4K capable units. Also functions perfectly with HDMI with HDMI to DVI adapters (not included) Power supply included but not shown in photos (sorry!)
eBay