It is a manual setup, however, it is impossible to miss the red handle being clear over by the truck bed's rail when closing tailgate, plugging in the cable, hooking up the break away cable, etc. It is much more obvious than a failure to hitch on visual inspection. You might have a bad hitch and the handle will still lock (you do pin or lock it, right?) and when locking the handle, I push the latch kit handle over and pin it also. It also makes me take a look at the rest of the hitch, a "second go around" on inspection. A failure to hitch or a hitch failure will get caught by the kit. Is it absolutely fool proof? No, but, even the Air Force has problems with the nuclear missile silo safeguards...anything devised by man can be defeated by man, even if unintentionally. For the price, it is well worth the installation to me and maybe, just maybe, it will keep me from dropping the trailer on the bed rails through my own stupidity or a hitch failure. It is certainly better than no safeguard at all...