550: Significance of red and black key fob/remote?

I got multiple sets of keys for my 550, and each key comes with a red and black key fob/remote. The manual states that they are “master” and “slave” remotes, and that I should lend out the black one if needed but never the red one, but what is the functional difference between the two? Are they just spares?

 

Dave, the Alarm Manual explains it all...

 

That’s the manual I read. I don’t know if I’m missing anything, but it basically states that there are red and black remotes, but not how they’re different.

As far as I can tell, they’re identical. Maybe one is colored red so that owners think of it as “the spare” and keep it separate from the remotes that are used every day.

 

All explained dozens of times in FChat, but see if this helps. Also look at the videos on ferrarifobs.com.