Will this allow the output monitor to function as the second display for a laptop?

It is a video switch that can switch between two monitors

can i use keyboard commands to switch?

I don't think this is software switchable - you need to press the button on the switch to switch from one computer to the other

Questions & Answers: HDMI KVM Switch, 4K@60Hz 2x1 HDMI2.0 Ports + 3X USB KVM Ports, Share 2 Computers to one UHD Monitor, Support Wireless Keyboard and Mouse, USB Disk, Printer, USB Camera (Included 2 USB Cable)

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HDMI KVM Switch, 4K@60Hz 2x1 HDMI2.0 Ports + 3X USB KVM Ports, Share 2 Computers to one UHD Monitor, Support Wireless Keyboard and Mouse, USB Disk, Printer, USB Camera (Included 2 USB Cable)

4K HDMI KVM Switcher Box allows you to control 2 computer with only one set of controls and display screen (mouse and keyboard).
This will be a good choice for Enterprise, Office, Multimedia Teaching, Meeting Room, Gaming Room, Home Theater, Research Test, etc.
HDMI KVM Switch 2 Port support Full 18 Gpbs bandwidth, Support resolution up to 4K@60Hz, HDMI2.0b, HDCP2.2 YUV:4:4:4 chroma sampling.
The USB HDMI Switch with button design, freely switch between 2 computers by pressing a button. Powered by HDMI cables, no power adapter required, plug and play, saving you space. Support wireless keyboard and mouse and mechanical gaming keyboard.
4K 2 Port HDMI KVM Switcher using high technology to decode, no need to drive, transmission technology support such as PC, Laptop, Apple TV, PS3/PS4/PS5, Xbox, Sony Bluray player, projectors, audio/video receivers and most of the HDMI capable devices. High-speed transmission without lag, no loss of picture and sound quality.

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