Doesn't work on either of my computers (new Dell laptop and desktop)

I ordered these because the ring light sounded very handy (I'm always struggling to get good lighting for web conferencing) and because my laptop's embedded camera is at the hinge which is an awkward angle. However, neither of the cameras I bought work on either of my computers. Both of my computers are relatively new -- a Dell Precision laptop purchased about 5 months ago, and a Dell OptiPlex desktop purchased last week. The cameras don't seem to work with the USB outlets -- the LED doesn't light up, the ring light doesn't light up, and the camera does not show up as an option on my computers. My best guess is that this device doesn't work with the newest USB ports. I am returning them.

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