The only thing stronger is a kick by a Mule. {{{ONE & A HALF MILLION VOLTS }}} Seriously, The sound of this thing crackling is enough to make you wet your panties. And It's rechargeable too. Plug in to a 110 volt AC outlet and your good for another day of crime fighting. No more batteries to buy. I've been zapped in the leg by a 300K unit - not pleasant. I wouldn’t want to go near this one. UPDATED INFO AS OF 4/4/09 - THIS UNIT WAS USED ON A DRUNK ATTACKER AND HE WAS KNOCKED DOWN & ON THE GROUND FOR A SOLID 15 MINUTES AND IN PAIN FOR AN HOUR. THOUGH, NO PERMANENT DAMAGE. May or may not come with the packaging. The one i have now has a built in plug - no cords to mess with - and it also has a built in safety - put the wrist band on and if an attacker were to grab the gun out of your hand it will activate the safety and render the gun useless to the attacker. Nylon sheath. All the paper work. Small enough to fit in a pack of cigarettes