The VM7804 4-Port HDMI Input Board from Aten is designed to be used with the company's Modular Matrix Switch, and can route any of four audio or video sources to any of four displays. The input board can also support extracted HDMI audio and embedded stereo audio.
ATEN VM7804 Specs
HDMI in: 4 x HDMI Type A female Audio in: 4 x captive screw connectors, 5 pole
5 VDC, 7 W
32 to 104°F / 0 to 40°C Humidity: 0-80% RH, non-condensing
-4 to 140°F / -20 to 60°C Humidity: 0-80% RH, non-condensing