As simple as it gets, I'm still confused as to what ohms, variable voltage, and watts really mean. How does these three things work on APV, genesis attys, and mods such as the provari? I'm in the stages of wanting to buy a new mod (mechanical), but also looking into something like a provari. And I just wanted to ask for some help as to what these three mean and how they work with such mods and what is a great set up would be. 
