[It only works for a few seconds, when he tries to stay conscious. This particular function seems designed to stun and render the person unconscious, though the mechanism seems unknown.
As for how long it takes, his wristwatch does have a clock function on it, which might help with timing it.
no subject
As for how long it takes, his wristwatch does have a clock function on it, which might help with timing it.
It leaves no residue.]