Will this adapter allow me to run two 1920 monitors as extended display?

The computer will only see one connected display (only one cable from the computer to the splitter), so there is no way to "extend" your desktop to the second display. It will however show the exact same image on both displays, which is sometimes useful during presentations.

Questions & Answers: StarTech ST122HD4K HDMI Splitter 1 In 2 Out - 4k 30 Hz - 2 Port - Aluminum - HDMI Multi Port - HDMI Audio Splitter

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StarTech ST122HD4K HDMI Splitter 1 In 2 Out - 4k 30 Hz - 2 Port - Aluminum - HDMI Multi Port - HDMI Audio Splitter

Split an HDMI audio/video source on two separate HDMI Displays simultaneously with support for resolutions up to 4K
Compatible with 4K HDMI video source devices such as desktop and laptop computers and 4K HDMI Televisions and Monitors
Backward compatibile with High-definition 1080p video sources and displays
Supports video resolutions up to 4K
1x2 HDMI Splitter / 2-port HDMI Splitter / 4K HDMI Splitter / 4K at 30Hz

$73^.29 –