My wife and I teach concealed carry and introduce the flashlight stun gun to our students as a less leathal alternative to discharging a firearm. The one we use is 4.5 million volts and 200 lumens for the working flashlight. They are cheap and work well.
I work as a security guard on weekends, and I carry one of these. The Vipertek VTS T03, to be exact. Getting a 2 for the price of 1 means I have one less thing to carry on my duty belt.
The VTS T03 is my favorite stun gun! Definitely recommend it to anyone looking for a less-lethal option. I carry it around especially when I go out walking in the night (bit if a night-hike kinda guy).