I am an old marine engine mechanic+++ and got all types of inspection cameras and ordinary ones so I got a clue what I wanted.. My house is 70.. year old and we got a sewer blockage under the house but no schematics of any type so after the plummer inspection it I wanted to buy a camera to really know my plummings.. In short I got the 5mm 30M type I wanted the 7mm but could not get it. 5mm cable is a type of do it all but not stiff enough for large pipe or long inspection. My sewer is 6" concrete. I would allways take the 30M cable coz like last night about 4M of the length went into nothing.. 2M for handling after the camera and 2+M to inside the pipe before the camera got out of the wall into the soil and then I got 26M left for real use. Top quality, display bright and clear (IF LENZ IS KEPT CLEAN), 5 led brightnes (perfect), camera perfect, simple to use, 32gb memory card (will last forever in pictures). Outstanding Manual (did not expect that), troubleshooting with diagrams to troubleshoot, written for DYI people. I would not buy a lesser model than this coz there is nothing extra in this model that I did not use when testing it last night. Is it perfect No the internal battery for the time does not hold more than a day.. and one button did not seem convincing.. did it bother me NO but not holding the date/time settings.... hmmm. Am I going to keep this sewer camera after my project YES. Would I buy another one YES, Do I want to be able to buy extra 7mm cable YES. Do I think this will last, Yes if well cleaned and do not strain the cable to much but instead clean and pressure wash the pipe before inspection. The pictures from the sewer camera came straight of the memory card with NO EDITING so nothing fake here. The pictures here are 5.12M dirty lenz + dirty water and the yellow is accumulated fat. At 4.32M dirty lenz and fat blockage. At 1.92M clean lenz and no water and clean 6" concrete pipe (age 70..). P.S. the plummer that did the first inspection could only get to 3M there is a bend but I am stuck at a blockage at 6.5M.. (so I got longer than he did.. Smile). I need to pressure wash before I can go further and find the real damage... This camera got the 512HZ transmitter and I will review that with the Sanyipace locator. kind regards.