It is an old model and neither its application (app) can be downloaded on today's technology mobile phones!!!

The Samsung A52 works great. Good quality for its price. It also comes with some accessories that seem to have a good fit.

OK for its price (~10€ in 2021). Low resolution and contrast, does not focus well on close-ups. In a car engine that I tested it, it got stuck inside the cylinder.

Very good resolution, very decent to work, download the OTG View2 application from the play store ... CAUTION if you have a mobile with a type c plug, also get an adapter https://www.skroutz.gr/s/14060011/Powertech-USB-C-male-micro-USB-female-CAB-UC019.html?from=catspan

Bad image quality, not even 640x480, you can't see anything clearly, it doesn't have autofocus, it doesn't adjust the LED, it is not compatible with all Android devices even though they support OTG (I have another endoscope that works on the same phone)

I used it as a plumber to see something I had no other way of seeing, and it did the job and made me laugh. Apart from the joke, it does a great job for its price

To avoid repeating the same things, I will add that it works on the Blackview BV6000. Also, I couldn't find any information or program to tell me if this phone supported UVC. So I bought it and luckily I was fortunate.
Overall, it's worth the 15 euros.

Good gadget. In the package, it also includes a mirror, a hook, a magnet, and a CD with software. It is not fully compatible with Android, the tablet/smartphone should support OTG and definitely support the connection of external cameras (have USB video class drivers). It was not recognized on two cheap tablets that I tried and on a Xperia smartphone... It works perfectly on Samsung Galaxy J5. You need to download an application like CameraFi to operate it. It has 6 LEDs around the camera and a brightness adjuster with a wheel. However, when it is in operation, it heats up noticeably even with the LEDs completely turned off.

(A simple way to determine if your device has UVC drivers is to download the Dashcam application from droidPerception on Google Play)