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).
www.aliexpress.com/item/10050...
Also on Amazon:
www.amazon.com/Andonstar-AD20...
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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#retrocomputing #vintagecomputing #infosec
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

[@root42]

Interesting that you are reviewing that microscope. Last year that same company asked me if I wanted to review it, too. As my channel is similarly small I think that's their target audience. ;)
I agreed, as I was and am still on the lookout for a decent microscope for my repairs and soldering, but the part never arrived. Oh well, bad luck, I guess...