Lol sorry for the quasi-engineer speak. I work with electronics all day so it's hard to remember not everyone is in the same line of work.
When I talk about time delays, the HU has to see a small gap in time between ON/OFF/ON and it's normally in the milliseconds. The MB and TR7 simulate these time delays along with the ON/OFF/ON states. For most units, a relay is enough for doing this since most units don't require a time delay. Older units you can even put the PB wire on chassis ground. But Pioneer caught on and programmed the HU to require those gaps between commands which is why we need something a little more advanced. Or a switch if you feel like toggling yourself. It's actually the most futureproof way, just an added hassle which I didn't want.