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Amazon.com: Movcle HDMI Splitter 1 in 4 out Full Ultra HD 1080P 4K/2K 1X4 Port Box Hub with US Adapter v1.4 Powered Certified for 3D Support : Electronics
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StarTech.com 4 Port HDMI Splitter - 4K 60Hz - 1x4 Way HDMI 2.0 Splitter - ST124HD202 - Audio & Video Cables - CDW.com
4-Port Mini DisplayPort to HDMI Splitter, MST Hub, 4K 60Hz UHD | Eaton