Review on Jiusion 2MP USB Digital Microscope | Portable Endoscope Camera with 8 LEDs | 40-1000X Magnification | Aluminum Alloy Stand | OTG Android, Mac, Windows 7/8/10, Linux Compatible by Deejay Allard

Dollar for dollar it's a pretty good buy but could use some improvement. The included kickstand is much better than many competing brands, but the rack and pinion are free to move when not engaged. A little friction could greatly improve this item. The way it is built, no height adjustment knobs are required. If the microscope is not attached, it will simply fall to its lowest position. Keep your fingers on the height adjuster while loosening the locking screw.