Just wanted to post a brief review here on my new mod. I got the Tesla Invader 3 for about $50 at the local vape shop and I LOVE IT! It's a dual 18650 in series mod, and coupled with either my Velocity rda or my Avacado RTA, it hits like a freakin' truck!!! It is, for the most part, an unregulated mod, however, it does have safety features such as short curcuit protection, overheating protection, etc. It also has a variable voltage control. If you're looking for a great, high quality, simple mod with a lot of punch, you can't beat it, especially at it's price!