My first endoscope and I'm totally happy. I think it's a great device with many possible uses for the hobby area. As a hobby mechanic on cars, I can now find lost small parts in the built-in engine compartment without jacking up the vehicle and removing the annoying underpanels. I can finally take a first look at my engines without removing the cylinder head. The camera quality is sufficient to even recognize the cross-hatch and larger grooves in the cylinder wall. The valve seat and the valves of a 1.3 liter engine are also easy to inspect. I can then transfer the images and videos stored on the memory card supplied to my PC and process them there. For this I needed an adapter for the corresponding memory card connection on the PC.
The only small disadvantage is the back of the camera body. Since the different diameters of the camera housing and the cable create a small step, the camera gets stuck there, for example when it is pulled back through the spark plug shaft from the combustion chamber. I wrapped the area with electrical tape to create a slant there so it wouldn't get caught anywhere when the camera was pulled back.
Conclusion: great value for money! Meets and exceeds all of my expectations. Would I buy again!