For the record, all of his posturing about carrying a weapon is magnificently stupid. I know Johnboy reads this, but let's be clear:
If he has what people think he has, that's not a Taser, that's a stun gun. There is a difference, and it's an important one. Namely, using a stun gun on someone as a self defense option is an incredibly poor idea. It'll hurt like a bitch for a few seconds, but it does not disable someone and drop them into convulsions like you see on TV, those are full on Tasers and even those aren't as solid as people think (ask any cop who's had one fail on him).
The pain goes away the second the current is off, and they can still move while it's on.
In short, what he's carrying is an illegal device that needs to be in arms reach of a person to be used and will temporarily hurt, but not incapacitate them.
The person most likely to get fucking wrecked in the event of him using that is the fatass in the scooter, friends and neighbors.
Legit, there's a million stories of people trying to use these and then getting the living shit kicked out of them. Sorry about whatever the jagoff who sold it to you said, but it's so useless you'd legit be better off with a bunch of quarters in a tube sock.