If you can use the HDMI port but computer can't find the new device when connect the USB port, please check. Try a new USB port in PC & wait for a while. Try a new USB cable. Make sure there is no TF card in the camera. Otherwise computer will define it as USB disk if camera has TF card.
The item "14MP HDMI Industry Camera USB Microscope Digital Eyepiece with C Mount Adapter" is in sale since Monday, August 29, 2016. This item is in the category "Industrial\Healthcare, Lab & Dental\Medical/Lab Equipment Attachments & Accessories\Microscope Parts & Accessories\Other Microscope Parts & Accessories". The seller is "outdoor2015" and is located in .This item can be shipped worldwide.