10.1" Full Focus HD 12MP Electron Digital Microscope with Touch Button Kentfaith, 50-1600X Magnification, Adjustable LED Shadowless Light, 2.4G Wireless Remote Control, Support for PC Connection
SKU: GW45.0062
Q
How can I adjust the height of the lens to set the focus distance? The silver knobs on the side of the vertical stand do not seem to turn or move vertically. Thank you.
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