I've been thinking about buying an endoscope camera for a long time and finally decided on this device. What was important to me was that it was easy to use, took decent pictures, that they could be saved and that the cable (also for hygienic reasons) was not tight connected to the screen. Since most people nowadays have a cell phone with a large display anyway, I didn’t want a model with its own monitor that takes up space or is so small that you can’t see anything on it and whose memory can only be expanded with an SD card must. Thanks to the associated Android app, the pictures and videos can not only be viewed but also saved directly on the mobile phone and sent from there if necessary. The only disadvantage of this constellation, both devices have to be held somehow, which can be difficult when you still need a free hand. For me, however, the advantages of this solution outweigh the disadvantages and the mobile phone can of course also be turned off or attached in another way, e.g. using an arm pocket like those used by runners. The dual function with the second camera attached to the side is also very practical, because it is not always lying the viewed object directly in front of the camera lens attached to the end of the cable. The view to the side thus expands the possible uses of the endoscope and the two cameras can be switched in the app or simply viewed in a "split screen". As far as durability or water resistance is concerned, I can't make any statements after a few short tests but the good workmanship the ease of use and what I consider to be a very good image quality speak for themselves. So far a good decision.