Doesn't work with the old Logitech mx3300 mouse and keyboard combo but won't cause USB mouse and USB keyboard problems. I tried using it with a webcam but it didn't work as it's not made to be faulty. The only drawback is that the device itself hums a bit when used properly. I have not used the support so there is no review on this part. EDIT: The hum is coming from one of the audio parts of the computer (ac97), don't know what is related to the KVM switch, but there is no hum with the mic, speaker or video unplugged. I have decided to donate the microphone.
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