Horsebox CCTV

No I didn't - I found that I need to reverse so rarely I didn't really need it.
 
I've used wired and wireless ones, the cheap wired worked fine, not the best pic inside or behind but good enough to know what was going on. The wireless one was annoying as the picture flickered on and off non-stop, but you could still get the jist.
 
newrider.com