Andonstar AD208 Review with a HP25 Calculator

I review this inexpensive digital microscope which is available from AliExpress and Amazon, put it under its paces to look at traces on an old HP25 vintage calculator. It's a super affordable scope, but is it any good?

Thanks heaps to Lucca at Andonstar for providing this scope for me to review. You can buy the device on AliExpress (currently on special at around $150NZD). https://www.aliexpress.com/item/1005001572737660.html Also on Amazon: https://www.amazon.com/Andonstar-AD208-Microscope-Microscopes-Inspection/dp/B08LQ8GFRP

Note that whilst I was provided this device for free, I was not paid to endorse it, nor have I reviewed it with any bias.

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TOC: 0:00 Introduction 1:32 Specifications 2:18 What's in the box 4:02 Assembling the scope 5:04 Display features 5:54 Control cable & SD card 6:32 Battery compartment? 7:36 Switching on with USB power 8:11 Adjusting light intensity on scope 8:34 Looking at an HP25 calculator 9:20 Manually adjust focus 9:52 Adjusting side light brightness 10:42 Close up of circuit board 11:40 Focus adjusted closeup 11:47 Dealing with large boards might be tough 12:21 Distance adjustment / Zoom 14:00 Super close up 14:38 Overall thoughts ... https://www.youtube.com/watch?v=imQe8E9G4Gg