Review on 🔬 Gray USB Digital Microscope Camera 40X-1000X Handheld Mini Microscope for Students, Engineers, and Biology Lovers. Compatible with Windows 7, 8, 10, Android. Ideal for Microbiological Observations by Nick Palacio

Very cool. Pretty impressive for under $20. Had to download a third party app to make it work on my phone. The guide only shows how to set it up on a computer. That's the only reason I didn't give five stars. Attached to my review is a photo of a ballpoint pen taken at the highest possible magnification.