10.1" Full Focus HD Electron Digital Microscope, 12 Million Pixels, Touch Button, 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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