Has now for the first time after purchasing the camera for inspection of a rain pipe use. The informational value of the displayed monitor image is close to zero, because the cheap plastic glazing reflects the light of the LEDs in the lens and creates a white milky image. Another weak point is the low image radius, so that a complete pipe cross-section can not be displayed. For better guidance I used a spiral channel. The camera was in a ping pong ball to a contamination of the lens to avoid. The picture quality is certainly useful, but not for the specified purpose. Too bad about the money.