It also has a separate 3.5mm stereo audio and optical SPDIF port that can be connected to external speakers, amplifiers, loudspeakers, etc. 8 adjustable display modes: This 2x2 HDMI video image processor can connect up to 4 LCD TVs or other displays and can support multiple display modes, such as 2x2, 1x1, 1x2, 1x3, 1x4, 4x1, 3x1, 2x1.
eBay