It's a collar, and you can thank the mafia for that while we were their 'guests'! [he swallows, because here's the part Hiro's going to hate just as much as he does.] You can't stop it once it starts, you have to- you have to let it finish and then leave it alone. The jammer I put on it keeps him from being tracked

[by Baymax as well, incidentally, and Robert himself has a modified wrist-bracer with a similar device within it {he has two- the other, however, holds a dart-launcher for when he's in a position where the microbots aren't feasible}]

but I couldn't do anything to interfere with the shock itself without...without...

[...without risking massive trauma, if not death. and that was not a risk he was willing to ask Tadashi to take, not after everything.]