I bought this hoping to split my laptop and tower into one wide curved monitor. In this mode, the display was so degraded that it was unreadable. Maybe the 4K version works better, but I returned the device and bought a KVM switch. There is no picture-in-picture or split-screen, but it solves the problem and is significantly cheaper.
NEWCARE HDMI KVM Switch: 4K@60Hz, 2x1 HDMI2.0 Ports + 3X USB KVM Ports - Share 2 Computers on UHD Monitor, with Wireless Keyboard and Mouse Support - USB Disk, Printer, USB Camera Compatible
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Computer case be quiet! Pure Base 500 black
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