Teslong 5MP Auto-Focus Endoscope, 3rd Generation USB Borescope with 5.0 Megapixel Inspection Camera, 16.5ft Waterproof Semi-Rigid Cable & Adjustable Led Lights Probe for Android Phone Windows MacBook

Great product! the picture quality and auto focus stand out, compared with other two popular seller amongst the top 100 in Amazon. Good enough, but would be even better if the lights are brighter.

Ultimate

A quick delivery, needed to activate the OTG feature on my cell phone to get it to work, but after that it works great, found it has a good auto focus with a good depth of field.

Been searching for this since I bought my first endoscope (another maker) which was fixed focus about 1/2 inch from the lens. Autofocus on this model works perfectly. I can examine unreachable objects from any distance. 5 MP lens gives great images. Works perfectly with my Windows laptop. Couldn't get the Google Play Teslong HD Camera app to work on my Note 9 but that was a permission issue. Couldn't grant camera permission to it no matter what I tried. Finally downloaded the apk from the site in the instruction manual and it works. USB C adapter gives a flimsy connection, probably will wrap it with tape if I use this with with my phone. This is a superior product for the price, if I ever need another I will definitely buy this brand. Note I did not try this as a borescope, no idea how useful this would be for pipe inspection but that's not what I bought it for. The cable is semi-rigid so it's much easier to maneuver in tight spaces. Yes, this is a real review. No one gave me anything or even asked me to write this review. Wayne Davis

Out of the few endoscope I bought, this one has highest image quality. The only downside is that the diameter is large (12.5mm).