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we want to set one CPU, dual monitor configuration, the distance of one monitor to another monitor is about 20~30meters, can use this switch?
This switch would work, but a longer cable than what is included would be required for your displays. A video extender such as https://www.kvm-switches-online.com/ext-vga-141sr.html would be the best way to go this distance and maintain signal quality.
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Is the USB peripherals connection 2.0? and does this support Win 7?
The peripherals for this switch are USB 1.1 and the operating systems supported are Windows 98, 98SE, ME, 2000, and XP.

For a dual VGA switch with USB 2.0, we recommend https://www.kvm-switches-online.com/av4pro-vga-dual.html
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can I connect Samsung 900x3a laptop and Dell Dimension B110 desktop, and use two monitors.
Thank you for your inquiry. Yes, this unit will support dual monitors, dependent on both computers supporting dual monitors as well. It will not, however, allow you to share the laptop monitor with the desktop PC. Nor will it provide dual monitor support to a computer whose video card does not already support two monitors.

Because user environments vary so much, we cannot guarantee any particular setup will work; but if your computers are USB, VGA and from the supported OS\'s, it should work.
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Can I use this with Win 7 and is it possible to do a firmware upgrade for usb 2 compatible?
Thank you for your inquiry. Unfortunately, this KVM will probably have issues with Windows 7. It does not appear to provide full time EDID information to the attached computers. There is a flash upgrade port, however to accommodate hi-speed USB 2.0 would require hardware upgrades.
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What if I have a Macbook Pro (Early 2011). I only have 1 video outlet. Will this split it for me via 1 port from my computer?
Thank you for your inquiry. Unfortunately, no, it will not operate as a video signal splitter. This KVM requires two video out ports to function as a dual monitor unit.
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