iStrong upgraded dual digital wireless backup cameras

Test of iStrong's digital wireless daul camera backup system for campers and trucks. My situations is one where I back a large 5th camper into a steel building that has in the past render all the other wireless cameras worthless with signals lost.
The iStrong upgraded dual digital wireless camera system with guidelines was purchased at Amazon: www.amazon.com/gp/product/B07...

[@muhammedq9109]

Hi would it be too big for a regular 4door car ?