1. Brightness adjustment is useless: it is thoroughly too bright and the image is all white. For any other position that is too dark and can not see anything, the image is black (there is no way to find an intermediate position).
2. the quality of the image is correct only in very specific conditions: good distance, good angle, etc. Suffice to say that it is impossible to achieve in a pipe! The few correct images that I could get standing full chance and have served for nothing.
3. just a tiny bit of water on the lens so that the image is completely blurred.
Basically: it is money thrown out the window. The product is not worth a return that would cost, but I should have expected given the price. I had much better results with a DIY home using a laptop USB webcam and a front LED lamp.
