Since there is a protective film on the screen, the stamp is on the protective layer. Please don't worry, it is original and never used. All in all, if you are dissatisfied with the screen, please tear off the protective film. Tear off the green tab in the corner of the screen. 

It can be used after booting without installing any APP, which is very convenient. 

Tear off the protective film on the screen, clean the camera lens, on the settings page, set the resolution to 1920*1080, adjust the LED light to the maximum, the endoscope needs to focus, the viewing distance is 4cm to 5 m. You can find it at Find the best clear distance within this range, 4cm to 20cm is recommended, this distance is very clear and you can even read the words in the manual clearly. 

Yes, the camera lens is IP72 waterproof and suitable for different types of environments such as: B. Car inspections, water probes, wet or wet areas, etc. 

Semi-rigid cables can be bent and maintain their shape to reach a variety of tight places to meet different usage needs.