First of the positives:
The thing works, the cable is long, running Windows 7 no driver must be installed and the software runs without installation. The program displays the camera image and provides the possibility of snapshots (BMP) or a video recording. Pretty simple but functional. The (auto -) focus is serving in a very limited area and the built-in LED's light up the camera field of good. The thing is waterproof, very Ehlich.
But there are also negative points:
I'll start with the LEDs, somehow take the image colors. It all looks very black / white and at full brightness, the light is reflected light in the lens. The cable is long but very flexible. This way you can push the endoscope bad as you would need it if you do not operate down and not in narrow tubes. Here would be something more rigid but better. Also because of "Where is now the top and bottom?" would be nice a little more guidance.
Why do I have now but awarded 4 stars and not 3? The price for a functioning endoscope 30 is fine. Even a piece of rigid 1.5mm copper cable to and the last negative point can also be mastered provisionally ...
