What is the micro USB port for?

It's a mini-USB, not micro-USB. It's supplemental/optional for power in case the switch fails to run off either computer's own USB power. USB-A to micro-USB cable is NOT included in package.

What about audio/speakers? Thanks much.

I don't think the switch will support wired stand alone speakers. I have two computers. One online, the other is not. I use the switch to flip back and forth. The audio is plugged into the back of the online system. Hope this helps a little. The switch works fine...

Questions & Answers: Rosewill 2-Port USB DVI KVM Switch - RKV-18001

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Rosewill 2-Port USB DVI KVM Switch - RKV-18001

Instant Switching: Includes a button controller to switch between two computers that can be controlled from a single keyboard, monitor and mouse
Plug and Play: Simply connect the PCs you want to control with your set of peripherals; KVM switch supports any combination of Windows, Mac and Linux operating systems; does not require drivers or software installation
1920x1200@60Hz Video Resolution: Supports DVI connections, USB keyboards and USB mice

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