Okay, so this isn't "laboratory grade" by any stretch, but for personal use and curiosity / exploration it's really great! I've been using it via USB on my PC mostly. It's accessible via WiFi and their app, but I really don't want a different app on my phone for every Wifi device that wants me to control with wifi =.=

Via USB it connected right to the Windows Camera app just like any plug and play webcam. The zoom is manually controlled by turning the zoom ring on the scope. It will wobble a lot when doing this, even carefully, but the included base and arm are actually fairly decent and have always gone back to where I was focusing if I displaced it a tad while adjusting it.
While I don't personally have much need/want (right now) for the cordless/wifi option, the fact it's there would be quite handy for folks trying to look at things in nature or checking for specific stuffs (so technical, I know...). The phone app based on the Play page seems similar to the Wifi Depstech endoscope I have. Boot up the app, change the Wifi your phone's using to the one being broadcast by the scope to see a feed and take videos or photos. Might be able to adjust zoom via the app, but I don't know for sure.
Pics and Vid attached... I need to clean my desk mat I guess haha

This is 100% NOT a toy - a good thing here. I mean, I love playing with it... but I wouldn't just hand this to a younger kid and expect to get it back in working order. It is digital enhancement (FINALLY that sci-fi trope of "enhance... enhance..." comes to life!) for better or worse. Still seems like a good resolution at fully zoomed in, but will still it the same walls cameras might for zooming when digital v. lenses.

I really did expect MUCH lower quality for $40. Thankfully it's fairly decent quality construction, casing, materials, and the digital zoom is nice. It'd be kinda nice to have some indication of what zoom% you're at.