Review on Koolertron Portable USB Microscope Stand - Adjustable Manual Focus, Aluminum Alloy Holder for Digital Microscopes with Up and Down Adjustment Support by Mary Williams

The stand is neat and does not vibrate when lightly touched or blown into. Unfortunately, the installation location suffers from a lack of adjustability. If there were a third mounting bolt and each of the three bolts were 10mm longer then all the problems would be solved. The zoom/focus knob (depending on the application) is effective, but make sure you tighten the set screw once in the desired position. .