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StarTech.com 2-Port 4K HDMI Cable Splitter – USB or Power (ST122HD4KU)
Can I use an HDMI splitter to extend, not duplicate, my laptop screen across two monitors? - Quora
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DVI/HDMI/VGA Splitter With 2/4/8/16 Ports (SP201D,SP401D,SP801D) - China Dvi Spliiter and Hdmi Splitter
MONOPRICE Computer Cable Adapter/Splitter: (2) DVI-D Female/HDMI Male, 8 in Cable Lg, Black - 6CZN8|2521 - Grainger